399199731492 has 24 divisors (see below), whose sum is σ = 931536620896. Its totient is φ = 133056494208.

The previous prime is 399199731487. The next prime is 399199731611. The reversal of 399199731492 is 294137991993.

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, 1094533 + ... + 1412940.

Almost surely, 2^399199731492 is an apocalyptic number.

It is an amenable number.

399199731492 is an abundant number, since it is smaller than the sum of its proper divisors (532336889404).

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

399199731492 is a wasteful number, since it uses less digits than its factorization.

399199731492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520747 (or 2520745 counting only the distinct ones).

The product of its digits is 29760696, while the sum is 66.

The spelling of 399199731492 in words is "three hundred ninety-nine billion, one hundred ninety-nine million, seven hundred thirty-one thousand, four hundred ninety-two".