399020272 has 20 divisors (see below), whose sum is σ = 883545136. Its totient is φ = 171008640.

The previous prime is 399020239. The next prime is 399020287. The reversal of 399020272 is 272020993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781229 + ... + 1781452.

Almost surely, 2^399020272 is an apocalyptic number.

It is an amenable number.

399020272 is an abundant number, since it is smaller than the sum of its proper divisors (484524864).

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

399020272 is a wasteful number, since it uses less digits than its factorization.

399020272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562696 (or 3562690 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 399020272 is about 19975.4917836833. The cubic root of 399020272 is about 736.2042497872.

The spelling of 399020272 in words is "three hundred ninety-nine million, twenty thousand, two hundred seventy-two".