404123256 has 80 divisors (see below), whose sum is σ = 1142143200. Its totient is φ = 133491456.

The previous prime is 404123227. The next prime is 404123261. The reversal of 404123256 is 652321404.

404123256 is a `hidden beast` number, since 404 + 1 + 2 + 3 + 256 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70465 + ... + 75983.

It is an arithmetic number, because the mean of its divisors is an integer number (14276790).

Almost surely, 2^404123256 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 404123256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571071600).

404123256 is an abundant number, since it is smaller than the sum of its proper divisors (738019944).

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

404123256 is a wasteful number, since it uses less digits than its factorization.

404123256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5650 (or 5637 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 404123256 is about 20102.8171160164. The cubic root of 404123256 is about 739.3293509934.

The spelling of 404123256 in words is "four hundred four million, one hundred twenty-three thousand, two hundred fifty-six".