399345544 has 32 divisors (see below), whose sum is σ = 834183000. Its totient is φ = 177956352.

The previous prime is 399345533. The next prime is 399345577. The reversal of 399345544 is 445543993.

It can be written as a sum of positive squares in 4 ways, for example, as 357588100 + 41757444 = 18910^2 + 6462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 399345494 and 399345503.

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, 63189 + ... + 69220.

Almost surely, 2^399345544 is an apocalyptic number.

It is an amenable number.

399345544 is an abundant number, since it is smaller than the sum of its proper divisors (434837456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399345544 is a wasteful number, since it uses less digits than its factorization.

399345544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132457 (or 132453 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 46.

The square root of 399345544 is about 19983.6319021343. The cubic root of 399345544 is about 736.4042409537.

The spelling of 399345544 in words is "three hundred ninety-nine million, three hundred forty-five thousand, five hundred forty-four".