399332256 has 96 divisors (see below), whose sum is σ = 1107509760. Its totient is φ = 125731584.

The previous prime is 399332249. The next prime is 399332273. The reversal of 399332256 is 652233993.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182175 + ... + 184353.

It is an arithmetic number, because the mean of its divisors is an integer number (11536560).

Almost surely, 2^399332256 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 399332256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553754880).

399332256 is an abundant number, since it is smaller than the sum of its proper divisors (708177504).

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

399332256 is a wasteful number, since it uses less digits than its factorization.

399332256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298 (or 2290 counting only the distinct ones).

The product of its digits is 262440, while the sum is 42.

The square root of 399332256 is about 19983.2994272718. The cubic root of 399332256 is about 736.3960730498.

The spelling of 399332256 in words is "three hundred ninety-nine million, three hundred thirty-two thousand, two hundred fifty-six".