399357432 has 32 divisors (see below), whose sum is σ = 1109326800. Its totient is φ = 133119072.

The previous prime is 399357419. The next prime is 399357437. The reversal of 399357432 is 234753993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399357437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924223 + ... + 924654.

Almost surely, 2^399357432 is an apocalyptic number.

It is an amenable number.

399357432 is an abundant number, since it is smaller than the sum of its proper divisors (709969368).

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

399357432 is a wasteful number, since it uses less digits than its factorization.

399357432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848892 (or 1848882 counting only the distinct ones).

The product of its digits is 612360, while the sum is 45.

The square root of 399357432 is about 19983.9293433499. The cubic root of 399357432 is about 736.4115481483.

It can be divided in two parts, 3993 and 57432, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 399357432 in words is "three hundred ninety-nine million, three hundred fifty-seven thousand, four hundred thirty-two".