399883994 has 16 divisors (see below), whose sum is σ = 632681280. Its totient is φ = 189033120.

The previous prime is 399883969. The next prime is 399884021. The reversal of 399883994 is 499388993.

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, 8654 + ... + 29574.

It is an arithmetic number, because the mean of its divisors is an integer number (39542580).

Almost surely, 2^399883994 is an apocalyptic number.

399883994 is a deficient number, since it is larger than the sum of its proper divisors (232797286).

399883994 is a wasteful number, since it uses less digits than its factorization.

399883994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21445.

The product of its digits is 15116544, while the sum is 62.

The square root of 399883994 is about 19997.0996396978. The cubic root of 399883994 is about 736.7350645482.

The spelling of 399883994 in words is "three hundred ninety-nine million, eight hundred eighty-three thousand, nine hundred ninety-four".