256464828 has 18 divisors (see below), whose sum is σ = 648286184. Its totient is φ = 85488264.

The previous prime is 256464823. The next prime is 256464847. The reversal of 256464828 is 828464652.

256464828 is a `hidden beast` number, since 2 + 564 + 6 + 4 + 82 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256464823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3561976 + ... + 3562047.

Almost surely, 2^256464828 is an apocalyptic number.

It is an amenable number.

256464828 is an abundant number, since it is smaller than the sum of its proper divisors (391821356).

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

256464828 is a wasteful number, since it uses less digits than its factorization.

256464828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124033 (or 7124028 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 256464828 is about 16014.5192871969. The cubic root of 256464828 is about 635.3444949097.

The spelling of 256464828 in words is "two hundred fifty-six million, four hundred sixty-four thousand, eight hundred twenty-eight".