399993232 has 20 divisors (see below), whose sum is σ = 775715356. Its totient is φ = 199808640.

The previous prime is 399993227. The next prime is 399993233. The reversal of 399993232 is 232399993.

It can be written as a sum of positive squares in 2 ways, for example, as 109495296 + 290497936 = 10464^2 + 17044^2 .

It is not an unprimeable number, because it can be changed into a prime (399993233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6682 + ... + 29062.

Almost surely, 2^399993232 is an apocalyptic number.

It is an amenable number.

399993232 is a deficient number, since it is larger than the sum of its proper divisors (375722124).

399993232 is a wasteful number, since it uses less digits than its factorization.

399993232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23506 (or 23500 counting only the distinct ones).

The product of its digits is 708588, while the sum is 49.

The square root of 399993232 is about 19999.8307992843. The cubic root of 399993232 is about 736.8021441171.

The spelling of 399993232 in words is "three hundred ninety-nine million, nine hundred ninety-three thousand, two hundred thirty-two".