399779496 has 32 divisors (see below), whose sum is σ = 1110499200. Its totient is φ = 133259760.

The previous prime is 399779489. The next prime is 399779533. The reversal of 399779496 is 694977993.

399779496 is a `hidden beast` number, since 399 + 77 + 94 + 96 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925200 + ... + 925631.

It is an arithmetic number, because the mean of its divisors is an integer number (34703100).

Almost surely, 2^399779496 is an apocalyptic number.

399779496 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399779496 is an abundant number, since it is smaller than the sum of its proper divisors (710719704).

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

399779496 is a wasteful number, since it uses less digits than its factorization.

399779496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850846 (or 1850836 counting only the distinct ones).

The product of its digits is 23147208, while the sum is 63.

The square root of 399779496 is about 19994.4866400716. The cubic root of 399779496 is about 736.6708842284.

The spelling of 399779496 in words is "three hundred ninety-nine million, seven hundred seventy-nine thousand, four hundred ninety-six".