399170464 has 72 divisors (see below), whose sum is σ = 997321248. Its totient is φ = 155514240.

The previous prime is 399170441. The next prime is 399170479. The reversal of 399170464 is 464071993.

It is a self number, because there is not a number n which added to its sum of digits gives 399170464.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5677 + ... + 28819.

It is an arithmetic number, because the mean of its divisors is an integer number (13851684).

Almost surely, 2^399170464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399170464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498660624).

399170464 is an abundant number, since it is smaller than the sum of its proper divisors (598150784).

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

399170464 is a wasteful number, since it uses less digits than its factorization.

399170464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23178 (or 23163 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 399170464 is about 19979.2508368057. The cubic root of 399170464 is about 736.2966077668.

The spelling of 399170464 in words is "three hundred ninety-nine million, one hundred seventy thousand, four hundred sixty-four".