399369502 has 12 divisors (see below), whose sum is σ = 696859200. Its totient is φ = 171158316.

The previous prime is 399369461. The next prime is 399369511. The reversal of 399369502 is 205963993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2037502 + ... + 2037697.

It is an arithmetic number, because the mean of its divisors is an integer number (58071600).

Almost surely, 2^399369502 is an apocalyptic number.

399369502 is a deficient number, since it is larger than the sum of its proper divisors (297489698).

399369502 is a wasteful number, since it uses less digits than its factorization.

399369502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075215 (or 4075208 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 46.

The square root of 399369502 is about 19984.2313337291. The cubic root of 399369502 is about 736.4189670644.

The spelling of 399369502 in words is "three hundred ninety-nine million, three hundred sixty-nine thousand, five hundred two".