256459896 has 192 divisors, whose sum is σ = 874298880. Its totient is φ = 65975040.

The previous prime is 256459859. The next prime is 256459901. The reversal of 256459896 is 698954652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 925710 + ... + 925986.

It is an arithmetic number, because the mean of its divisors is an integer number (4553640).

Almost surely, 2^256459896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256459896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437149440).

256459896 is an abundant number, since it is smaller than the sum of its proper divisors (617838984).

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

256459896 is a wasteful number, since it uses less digits than its factorization.

256459896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 467 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 256459896 is about 16014.3653011913. The cubic root of 256459896 is about 635.3404221756.

The spelling of 256459896 in words is "two hundred fifty-six million, four hundred fifty-nine thousand, eight hundred ninety-six".