399639662 has 16 divisors (see below), whose sum is σ = 640137600. Its totient is φ = 186705120.

The previous prime is 399639661. The next prime is 399639683. The reversal of 399639662 is 266936993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399639661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109337 + ... + 112932.

It is an arithmetic number, because the mean of its divisors is an integer number (40008600).

Almost surely, 2^399639662 is an apocalyptic number.

399639662 is a deficient number, since it is larger than the sum of its proper divisors (240497938).

399639662 is a wasteful number, since it uses less digits than its factorization.

399639662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222331.

The product of its digits is 2834352, while the sum is 53.

The square root of 399639662 is about 19990.9895202814. The cubic root of 399639662 is about 736.5849838340.

The spelling of 399639662 in words is "three hundred ninety-nine million, six hundred thirty-nine thousand, six hundred sixty-two".