256604502 has 32 divisors (see below), whose sum is σ = 639846144. Its totient is φ = 66650400.

The previous prime is 256604497. The next prime is 256604507. The reversal of 256604502 is 205406652.

It is an interprime number because it is at equal distance from previous prime (256604497) and next prime (256604507).

It is a self number, because there is not a number n which added to its sum of digits gives 256604502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256604507) 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 15 ways as a sum of consecutive naturals, for example, 277249 + ... + 278172.

It is an arithmetic number, because the mean of its divisors is an integer number (19995192).

Almost surely, 2^256604502 is an apocalyptic number.

256604502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256604502 is an abundant number, since it is smaller than the sum of its proper divisors (383241642).

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

256604502 is a wasteful number, since it uses less digits than its factorization.

256604502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555444.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 256604502 is about 16018.8795488324. The cubic root of 256604502 is about 635.4598128693.

The spelling of 256604502 in words is "two hundred fifty-six million, six hundred four thousand, five hundred two".