256507288 has 32 divisors (see below), whose sum is σ = 513779760. Its totient is φ = 119633920.

The previous prime is 256507253. The next prime is 256507297. The reversal of 256507288 is 882705652.

It is a super-2 number, since 2×256507288² = 131591977594229888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7023 + ... + 23713.

Almost surely, 2^256507288 is an apocalyptic number.

It is an amenable number.

256507288 is an abundant number, since it is smaller than the sum of its proper divisors (257272472).

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

256507288 is a wasteful number, since it uses less digits than its factorization.

256507288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16827 (or 16823 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 256507288 is about 16015.8449043439. The cubic root of 256507288 is about 635.3795552581.

The spelling of 256507288 in words is "two hundred fifty-six million, five hundred seven thousand, two hundred eighty-eight".