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12258880 = 265291321
BaseRepresentation
bin101110110000…
…111001000000
3212001211000121
4232300321000
511114241010
61114430024
7206125114
oct56607100
925054017
1012258880
116a13307
124132314
132702a9a
1418b1744
1511223da
hexbb0e40

12258880 has 56 divisors (see below), whose sum is σ = 30220920. Its totient is φ = 4730880.

The previous prime is 12258871. The next prime is 12258881. The reversal of 12258880 is 8885221.

12258880 = T285 + T286 + ... + T458.

It is a happy number.

12258880 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 3779136 + 8479744 = 1944^2 + 2912^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12258881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8620 + ... + 9940.

Almost surely, 212258880 is an apocalyptic number.

12258880 is a gapful number since it is divisible by the number (10) 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 12258880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15110460).

12258880 is an abundant number, since it is smaller than the sum of its proper divisors (17962040).

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

12258880 is a wasteful number, since it uses less digits than its factorization.

12258880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 12258880 is about 3501.2683416156. The cubic root of 12258880 is about 230.5775027467.

The spelling of 12258880 in words is "twelve million, two hundred fifty-eight thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 29 32 40 58 64 80 116 145 160 232 290 320 464 580 928 1160 1321 1856 2320 2642 4640 5284 6605 9280 10568 13210 21136 26420 38309 42272 52840 76618 84544 105680 153236 191545 211360 306472 383090 422720 612944 766180 1225888 1532360 2451776 3064720 6129440 12258880