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181112832 = 21232173
BaseRepresentation
bin10101100101110…
…01000000000000
3110121210111002200
422302321000000
5332331102312
625545513200
74326301515
oct1262710000
9417714080
10181112832
119326282a
12507a2800
132b6a3574
141a0a730c
1510d780dc
hexacb9000

181112832 has 156 divisors (see below), whose sum is σ = 555841260. Its totient is φ = 56819712.

The previous prime is 181112821. The next prime is 181112839. The reversal of 181112832 is 238211181.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 99680256 + 81432576 = 9984^2 + 9024^2 .

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 181112796 and 181112805.

It is not an unprimeable number, because it can be changed into a prime (181112839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10653688 + ... + 10653704.

It is an arithmetic number, because the mean of its divisors is an integer number (3563085).

Almost surely, 2181112832 is an apocalyptic number.

181112832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181112832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277920630).

181112832 is an abundant number, since it is smaller than the sum of its proper divisors (374728428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181112832 is an frugal number, since it uses more digits than its factorization.

181112832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 22 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 181112832 is about 13457.8167620160. The cubic root of 181112832 is about 565.7827998701.

The spelling of 181112832 in words is "one hundred eighty-one million, one hundred twelve thousand, eight hundred thirty-two".

Divisors: 1 2 3 4 6 8 9 12 16 17 18 24 32 34 36 48 51 64 68 72 96 102 128 136 144 153 192 204 256 272 288 289 306 384 408 512 544 576 578 612 768 816 867 1024 1088 1152 1156 1224 1536 1632 1734 2048 2176 2304 2312 2448 2601 3072 3264 3468 4096 4352 4608 4624 4896 4913 5202 6144 6528 6936 8704 9216 9248 9792 9826 10404 12288 13056 13872 14739 17408 18432 18496 19584 19652 20808 26112 27744 29478 34816 36864 36992 39168 39304 41616 44217 52224 55488 58956 69632 73984 78336 78608 83232 88434 104448 110976 117912 147968 156672 157216 166464 176868 208896 221952 235824 295936 313344 314432 332928 353736 443904 471648 591872 626688 628864 665856 707472 887808 943296 1183744 1257728 1331712 1414944 1775616 1886592 2515456 2663424 2829888 3551232 3773184 5030912 5326848 5659776 7546368 10061824 10653696 11319552 15092736 20123648 22639104 30185472 45278208 60370944 90556416 181112832