399758972 has 12 divisors (see below), whose sum is σ = 699765696. Its totient is φ = 199825920.

The previous prime is 399758971. The next prime is 399758977. The reversal of 399758972 is 279857993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399758971) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6773 + ... + 29075.

It is an arithmetic number, because the mean of its divisors is an integer number (58313808).

Almost surely, 2^399758972 is an apocalyptic number.

It is an amenable number.

399758972 is a deficient number, since it is larger than the sum of its proper divisors (300006724).

399758972 is a wasteful number, since it uses less digits than its factorization.

399758972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26788 (or 26786 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 59.

The square root of 399758972 is about 19993.9733919999. The cubic root of 399758972 is about 736.6582775355.

The spelling of 399758972 in words is "three hundred ninety-nine million, seven hundred fifty-eight thousand, nine hundred seventy-two".