399939368 has 16 divisors (see below), whose sum is σ = 751240980. Its totient is φ = 199608448.

The previous prime is 399939359. The next prime is 399939373. The reversal of 399939368 is 863939993.

It can be written as a sum of positive squares in 2 ways, for example, as 397683364 + 2256004 = 19942^2 + 1502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40421 + ... + 49332.

Almost surely, 2^399939368 is an apocalyptic number.

It is an amenable number.

399939368 is a deficient number, since it is larger than the sum of its proper divisors (351301612).

399939368 is a wasteful number, since it uses less digits than its factorization.

399939368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90316 (or 90312 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 59.

The square root of 399939368 is about 19998.4841425544. The cubic root of 399939368 is about 736.7690694806.

The spelling of 399939368 in words is "three hundred ninety-nine million, nine hundred thirty-nine thousand, three hundred sixty-eight".