399349545688 has 16 divisors (see below), whose sum is σ = 755406775080. Its totient is φ = 197907739008.

The previous prime is 399349545677. The next prime is 399349545701. The reversal of 399349545688 is 886545943993.

It is a super-3 number, since 3×399349545688³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399349545688.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220878270 + ... + 220880077.

Almost surely, 2^399349545688 is an apocalyptic number.

It is an amenable number.

399349545688 is a deficient number, since it is larger than the sum of its proper divisors (356057229392).

399349545688 is a wasteful number, since it uses less digits than its factorization.

399349545688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441758466 (or 441758462 counting only the distinct ones).

The product of its digits is 1007769600, while the sum is 73.

The spelling of 399349545688 in words is "three hundred ninety-nine billion, three hundred forty-nine million, five hundred forty-five thousand, six hundred eighty-eight".