256538496 has 32 divisors (see below), whose sum is σ = 681431400. Its totient is φ = 85512704.

The previous prime is 256538467. The next prime is 256538507. The reversal of 256538496 is 694835652.

256538496 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333651 + ... + 334418.

Almost surely, 2^256538496 is an apocalyptic number.

It is an amenable number.

256538496 is an abundant number, since it is smaller than the sum of its proper divisors (424892904).

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

256538496 is an equidigital number, since it uses as much as digits as its factorization.

256538496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668086 (or 668074 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The square root of 256538496 is about 16016.8191598707. The cubic root of 256538496 is about 635.4053220647.

The spelling of 256538496 in words is "two hundred fifty-six million, five hundred thirty-eight thousand, four hundred ninety-six".