256895064 has 40 divisors (see below), whose sum is σ = 719545860. Its totient is φ = 85631472.

The previous prime is 256895039. The next prime is 256895069. The reversal of 256895064 is 460598652.

256895064 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256895069) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 197574 + ... + 198869.

Almost surely, 2^256895064 is an apocalyptic number.

256895064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256895064 is an abundant number, since it is smaller than the sum of its proper divisors (462650796).

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

256895064 is a wasteful number, since it uses less digits than its factorization.

256895064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396461 (or 396448 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 256895064 is about 16027.9463438084. The cubic root of 256895064 is about 635.6995733112.

The spelling of 256895064 in words is "two hundred fifty-six million, eight hundred ninety-five thousand, sixty-four".