256823124 has 12 divisors (see below), whose sum is σ = 599253984. Its totient is φ = 85607704.

The previous prime is 256823111. The next prime is 256823141. The reversal of 256823124 is 421328652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×256823124² = 131916234042238752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10700952 + ... + 10700975.

It is an arithmetic number, because the mean of its divisors is an integer number (49937832).

Almost surely, 2^256823124 is an apocalyptic number.

It is an amenable number.

256823124 is an abundant number, since it is smaller than the sum of its proper divisors (342430860).

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

256823124 is a wasteful number, since it uses less digits than its factorization.

256823124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21401934 (or 21401932 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 256823124 is about 16025.7019815046. The cubic root of 256823124 is about 635.6402280723.

The spelling of 256823124 in words is "two hundred fifty-six million, eight hundred twenty-three thousand, one hundred twenty-four".