399463970988 has 36 divisors (see below), whose sum is σ = 963119716440. Its totient is φ = 128859341760.

The previous prime is 399463970953. The next prime is 399463970989. The reversal of 399463970988 is 889079364993.

It is a super-2 number, since 2×399463970988² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399463970989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17308273 + ... + 17331336.

Almost surely, 2^399463970988 is an apocalyptic number.

It is an amenable number.

399463970988 is an abundant number, since it is smaller than the sum of its proper divisors (563655745452).

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

399463970988 is a wasteful number, since it uses less digits than its factorization.

399463970988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34639678 (or 34639645 counting only the distinct ones).

The product of its (nonzero) digits is 634894848, while the sum is 75.

The spelling of 399463970988 in words is "three hundred ninety-nine billion, four hundred sixty-three million, nine hundred seventy thousand, nine hundred eighty-eight".