399374288 has 10 divisors (see below), whose sum is σ = 773787714. Its totient is φ = 199687136.

The previous prime is 399374279. The next prime is 399374291. The reversal of 399374288 is 882473993.

It can be written as a sum of positive squares in only one way, i.e., 359785024 + 39589264 = 18968^2 + 6292^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12480431 + ... + 12480462.

Almost surely, 2^399374288 is an apocalyptic number.

It is an amenable number.

399374288 is a deficient number, since it is larger than the sum of its proper divisors (374413426).

399374288 is a wasteful number, since it uses less digits than its factorization.

399374288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24960901 (or 24960895 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The square root of 399374288 is about 19984.3510777808. The cubic root of 399374288 is about 736.4219087738.

The spelling of 399374288 in words is "three hundred ninety-nine million, three hundred seventy-four thousand, two hundred eighty-eight".