399424692 has 24 divisors (see below), whose sum is σ = 933100000. Its totient is φ = 132983136.

The previous prime is 399424681. The next prime is 399424699. The reversal of 399424692 is 296424993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399424699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9067 + ... + 29682.

Almost surely, 2^399424692 is an apocalyptic number.

It is an amenable number.

399424692 is an abundant number, since it is smaller than the sum of its proper divisors (533675308).

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

399424692 is a wasteful number, since it uses less digits than its factorization.

399424692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39615 (or 39613 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 399424692 is about 19985.6121247261. The cubic root of 399424692 is about 736.4528881079.

The spelling of 399424692 in words is "three hundred ninety-nine million, four hundred twenty-four thousand, six hundred ninety-two".