399587444 has 6 divisors (see below), whose sum is σ = 699278034. Its totient is φ = 199793720.

The previous prime is 399587429. The next prime is 399587453. The reversal of 399587444 is 444785993.

It can be written as a sum of positive squares in only one way, i.e., 218684944 + 180902500 = 14788^2 + 13450^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49948427 + ... + 49948434.

It is an arithmetic number, because the mean of its divisors is an integer number (116546339).

Almost surely, 2^399587444 is an apocalyptic number.

It is an amenable number.

399587444 is a deficient number, since it is larger than the sum of its proper divisors (299690590).

399587444 is a wasteful number, since it uses less digits than its factorization.

399587444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99896865 (or 99896863 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The square root of 399587444 is about 19989.6834392143. The cubic root of 399587444 is about 736.5529010407.

The spelling of 399587444 in words is "three hundred ninety-nine million, five hundred eighty-seven thousand, four hundred forty-four".