256604535 has 48 divisors (see below), whose sum is σ = 494421408. Its totient is φ = 122054400.

The previous prime is 256604507. The next prime is 256604587. The reversal of 256604535 is 535406652.

It is a happy number.

It is not a de Polignac number, because 256604535 - 2⁶ = 256604471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256604535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21345 + ... + 31125.

It is an arithmetic number, because the mean of its divisors is an integer number (10300446).

Almost surely, 2^256604535 is an apocalyptic number.

256604535 is a deficient number, since it is larger than the sum of its proper divisors (237816873).

256604535 is a wasteful number, since it uses less digits than its factorization.

256604535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856 (or 9853 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 256604535 is about 16018.8805788669. The cubic root of 256604535 is about 635.4598401099.

The spelling of 256604535 in words is "two hundred fifty-six million, six hundred four thousand, five hundred thirty-five".