| Base | Representation |
|---|---|
| bin | 10101101000001… |
| … | …10000100000000 |
| 3 | 110122101112002100 |
| 4 | 22310012010000 |
| 5 | 332421202410 |
| 6 | 30000350400 |
| 7 | 4332055002 |
| oct | 1264060400 |
| 9 | 418345070 |
| 10 | 181428480 |
| 11 | 934589a2 |
| 12 | 50915400 |
| 13 | 2b78413c |
| 14 | 1a14a372 |
| 15 | 10ddb8c0 |
| hex | ad06100 |
181428480 has 108 divisors (see below), whose sum is σ = 627763500. Its totient is φ = 48377856.
The previous prime is 181428449. The next prime is 181428497. The reversal of 181428480 is 84824181.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 26873856 + 154554624 = 5184^2 + 12432^2 .
It is a super-2 number, since 2×1814284802 = 65832586710220800, which contains 22 as substring.
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is an unprimeable number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3646 + ... + 19394.
It is an arithmetic number, because the mean of its divisors is an integer number (5812625).
Almost surely, 2181428480 is an apocalyptic number.
181428480 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 181428480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313881750).
181428480 is an abundant number, since it is smaller than the sum of its proper divisors (446335020).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
181428480 is a wasteful number, since it uses less digits than its factorization.
181428480 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15776 (or 15759 counting only the distinct ones).
The product of its (nonzero) digits is 16384, while the sum is 36.
The square root of 181428480 is about 13469.5389676113. The cubic root of 181428480 is about 566.1112959394. Note that the first 3 decimals are identical.
The spelling of 181428480 in words is "one hundred eighty-one million, four hundred twenty-eight thousand, four hundred eighty".
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