399179400 has 48 divisors (see below), whose sum is σ = 1237458000. Its totient is φ = 106447680.

The previous prime is 399179383. The next prime is 399179419. The reversal of 399179400 is 4971993.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332050 + ... + 333249.

It is an arithmetic number, because the mean of its divisors is an integer number (25780375).

Almost surely, 2^399179400 is an apocalyptic number.

399179400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399179400 is an abundant number, since it is smaller than the sum of its proper divisors (838278600).

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

399179400 is a wasteful number, since it uses less digits than its factorization.

399179400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665318 (or 665309 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 399179400 is about 19979.4744675630. The cubic root of 399179400 is about 736.3021020756.

The spelling of 399179400 in words is "three hundred ninety-nine million, one hundred seventy-nine thousand, four hundred".