256805592 has 32 divisors (see below), whose sum is σ = 644348400. Its totient is φ = 85290624.

The previous prime is 256805579. The next prime is 256805597. The reversal of 256805592 is 295508652.

It is a super-2 number, since 2×256805592² = 131898224164940928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256805597) 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, 12667 + ... + 25962.

Almost surely, 2^256805592 is an apocalyptic number.

It is an amenable number.

256805592 is an abundant number, since it is smaller than the sum of its proper divisors (387542808).

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

256805592 is a wasteful number, since it uses less digits than its factorization.

256805592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38915 (or 38911 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 256805592 is about 16025.1549758497. The cubic root of 256805592 is about 635.6257637750.

The spelling of 256805592 in words is "two hundred fifty-six million, eight hundred five thousand, five hundred ninety-two".