399715142928 has 40 divisors (see below), whose sum is σ = 1034579470176. Its totient is φ = 132982636800.

The previous prime is 399715142867. The next prime is 399715142933. The reversal of 399715142928 is 829241517993.

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, 7966738 + ... + 8016753.

Almost surely, 2^399715142928 is an apocalyptic number.

It is an amenable number.

399715142928 is an abundant number, since it is smaller than the sum of its proper divisors (634864327248).

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

399715142928 is a wasteful number, since it uses less digits than its factorization.

399715142928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984023 (or 15984017 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 60.

The spelling of 399715142928 in words is "three hundred ninety-nine billion, seven hundred fifteen million, one hundred forty-two thousand, nine hundred twenty-eight".