399439080 has 64 divisors (see below), whose sum is σ = 1331467200. Its totient is φ = 106516800.

The previous prime is 399439063. The next prime is 399439093. The reversal of 399439080 is 80934993.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 183846 + ... + 186005.

It is an arithmetic number, because the mean of its divisors is an integer number (20804175).

Almost surely, 2^399439080 is an apocalyptic number.

399439080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399439080 is an abundant number, since it is smaller than the sum of its proper divisors (932028120).

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

399439080 is a wasteful number, since it uses less digits than its factorization.

399439080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369871 (or 369861 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 399439080 is about 19985.9720804368. The cubic root of 399439080 is about 736.4617307901.

The spelling of 399439080 in words is "three hundred ninety-nine million, four hundred thirty-nine thousand, eighty".