399072637492 has 12 divisors (see below), whose sum is σ = 698450951520. Its totient is φ = 199515222776.

The previous prime is 399072637433. The next prime is 399072637511. The reversal of 399072637492 is 294736270993.

It is a self number, because there is not a number n which added to its sum of digits gives 399072637492.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5231392 + ... + 5307127.

It is an arithmetic number, because the mean of its divisors is an integer number (58204245960).

Almost surely, 2^399072637492 is an apocalyptic number.

It is an amenable number.

399072637492 is a deficient number, since it is larger than the sum of its proper divisors (299378314028).

399072637492 is a wasteful number, since it uses less digits than its factorization.

399072637492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547990 (or 10547988 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 61.

The spelling of 399072637492 in words is "three hundred ninety-nine billion, seventy-two million, six hundred thirty-seven thousand, four hundred ninety-two".