399002636 has 24 divisors (see below), whose sum is σ = 710280480. Its totient is φ = 196094592.

The previous prime is 399002627. The next prime is 399002651. The reversal of 399002636 is 636200993.

It is a self number, because there is not a number n which added to its sum of digits gives 399002636.

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, 52910 + ... + 59978.

It is an arithmetic number, because the mean of its divisors is an integer number (29595020).

Almost surely, 2^399002636 is an apocalyptic number.

It is an amenable number.

399002636 is a deficient number, since it is larger than the sum of its proper divisors (311277844).

399002636 is a wasteful number, since it uses less digits than its factorization.

399002636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313 (or 7311 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 399002636 is about 19975.0503378590. The cubic root of 399002636 is about 736.1934033129.

The spelling of 399002636 in words is "three hundred ninety-nine million, two thousand, six hundred thirty-six".