399371512 has 16 divisors (see below), whose sum is σ = 772977600. Its totient is φ = 193244160.

The previous prime is 399371509. The next prime is 399371513. The reversal of 399371512 is 215173993.

It is a super-2 number, since 2×399371512² = 318995209194332288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399371513) 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, 804937 + ... + 805432.

It is an arithmetic number, because the mean of its divisors is an integer number (48311100).

Almost surely, 2^399371512 is an apocalyptic number.

It is an amenable number.

399371512 is a deficient number, since it is larger than the sum of its proper divisors (373606088).

399371512 is a wasteful number, since it uses less digits than its factorization.

399371512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610406 (or 1610402 counting only the distinct ones).

The product of its digits is 51030, while the sum is 40.

The square root of 399371512 is about 19984.2816233159. The cubic root of 399371512 is about 736.4202025114.

The spelling of 399371512 in words is "three hundred ninety-nine million, three hundred seventy-one thousand, five hundred twelve".