256535764 has 48 divisors (see below), whose sum is σ = 472747968. Its totient is φ = 121701888.

The previous prime is 256535761. The next prime is 256535771. The reversal of 256535764 is 467535652.

It is a super-2 number, since 2×256535764² = 131621196422127392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 256535764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256535761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302114 + ... + 1302310.

It is an arithmetic number, because the mean of its divisors is an integer number (9848916).

Almost surely, 2^256535764 is an apocalyptic number.

It is an amenable number.

256535764 is a deficient number, since it is larger than the sum of its proper divisors (216212204).

256535764 is a wasteful number, since it uses less digits than its factorization.

256535764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 422 counting only the distinct ones).

The product of its digits is 756000, while the sum is 43.

The square root of 256535764 is about 16016.7338742953. The cubic root of 256535764 is about 635.4030664793.

The spelling of 256535764 in words is "two hundred fifty-six million, five hundred thirty-five thousand, seven hundred sixty-four".