399642862 has 16 divisors (see below), whose sum is σ = 603698832. Its totient is φ = 198414720.

The previous prime is 399642847. The next prime is 399642863. The reversal of 399642862 is 268246993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399642863) 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, 249448 + ... + 251044.

It is an arithmetic number, because the mean of its divisors is an integer number (37731177).

Almost surely, 2^399642862 is an apocalyptic number.

399642862 is a deficient number, since it is larger than the sum of its proper divisors (204055970).

399642862 is a wasteful number, since it uses less digits than its factorization.

399642862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403.

The product of its digits is 1119744, while the sum is 49.

The square root of 399642862 is about 19991.0695561793. The cubic root of 399642862 is about 736.5869498264.

The spelling of 399642862 in words is "three hundred ninety-nine million, six hundred forty-two thousand, eight hundred sixty-two".