256435902 has 16 divisors (see below), whose sum is σ = 569857680. Its totient is φ = 85478616.

The previous prime is 256435877. The next prime is 256435903. The reversal of 256435902 is 209534652.

256435902 is a `hidden beast` number, since 2 + 5 + 64 + 3 + 590 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256435903) by changing a digit.

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, 2374353 + ... + 2374460.

It is an arithmetic number, because the mean of its divisors is an integer number (35616105).

Almost surely, 2^256435902 is an apocalyptic number.

256435902 is an abundant number, since it is smaller than the sum of its proper divisors (313421778).

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

256435902 is a wasteful number, since it uses less digits than its factorization.

256435902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748824 (or 4748818 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 256435902 is about 16013.6161437697. The cubic root of 256435902 is about 635.3206077280.

The spelling of 256435902 in words is "two hundred fifty-six million, four hundred thirty-five thousand, nine hundred two".