399370322 has 18 divisors (see below), whose sum is σ = 649278693. Its totient is φ = 184155192.

The previous prime is 399370319. The next prime is 399370333. The reversal of 399370322 is 223073993.

It can be written as a sum of positive squares in 2 ways, for example, as 341473441 + 57896881 = 18479^2 + 7609^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14131.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 366863 + ... + 367949.

Almost surely, 2^399370322 is an apocalyptic number.

399370322 is a deficient number, since it is larger than the sum of its proper divisors (249908371).

399370322 is an equidigital number, since it uses as much as digits as its factorization.

399370322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 399370322 is about 19984.2518498942. The cubic root of 399370322 is about 736.4194710781.

The spelling of 399370322 in words is "three hundred ninety-nine million, three hundred seventy thousand, three hundred twenty-two".