256145600 has 42 divisors (see below), whose sum is σ = 630282204. Its totient is φ = 102457600.

The previous prime is 256145569. The next prime is 256145611. The reversal of 256145600 is 6541652.

It is a super-2 number, since 2×256145600² = 131221136798720000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78446 + ... + 81645.

Almost surely, 2^256145600 is an apocalyptic number.

256145600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256145600 is an abundant number, since it is smaller than the sum of its proper divisors (374136604).

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

256145600 is a wasteful number, since it uses less digits than its factorization.

256145600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160113 (or 160098 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 256145600 is about 16004.5493532308. The cubic root of 256145600 is about 635.0807758859.

The spelling of 256145600 in words is "two hundred fifty-six million, one hundred forty-five thousand, six hundred".