399163452 has 24 divisors (see below), whose sum is σ = 931706832. Its totient is φ = 133008000.

The previous prime is 399163447. The next prime is 399163529. The reversal of 399163452 is 254361993.

It is a happy number.

It is a super-2 number, since 2×399163452² = 318662922825112608, which contains 22 as substring.

It is a congruent number.

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, 57952 + ... + 64472.

It is an arithmetic number, because the mean of its divisors is an integer number (38821118).

Almost surely, 2^399163452 is an apocalyptic number.

It is an amenable number.

399163452 is an abundant number, since it is smaller than the sum of its proper divisors (532543380).

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

399163452 is a wasteful number, since it uses less digits than its factorization.

399163452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11629 (or 11627 counting only the distinct ones).

The product of its digits is 174960, while the sum is 42.

The square root of 399163452 is about 19979.0753539797. The cubic root of 399163452 is about 736.2922963740.

The spelling of 399163452 in words is "three hundred ninety-nine million, one hundred sixty-three thousand, four hundred fifty-two".