320256404 has 24 divisors (see below), whose sum is σ = 639065448. Its totient is φ = 139115520.

The previous prime is 320256397. The next prime is 320256427. The reversal of 320256404 is 404652023.

It can be written as a sum of positive squares in 4 ways, for example, as 204304 + 320052100 = 452^2 + 17890^2 .

It is a super-2 number, since 2×320256404² = 205128328606022432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180257 + ... + 182024.

It is an arithmetic number, because the mean of its divisors is an integer number (26627727).

Almost surely, 2^320256404 is an apocalyptic number.

320256404 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

320256404 is a deficient number, since it is larger than the sum of its proper divisors (318809044).

320256404 is a wasteful number, since it uses less digits than its factorization.

320256404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362315 (or 362313 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 320256404 is about 17895.7090946405. The cubic root of 320256404 is about 684.1730151797.

The spelling of 320256404 in words is "three hundred twenty million, two hundred fifty-six thousand, four hundred four".