399772696 has 32 divisors (see below), whose sum is σ = 760495680. Its totient is φ = 196992000.

The previous prime is 399772687. The next prime is 399772699. The reversal of 399772696 is 696277993.

It is a self number, because there is not a number n which added to its sum of digits gives 399772696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399772699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209346 + ... + 211246.

It is an arithmetic number, because the mean of its divisors is an integer number (23765490).

Almost surely, 2^399772696 is an apocalyptic number.

It is an amenable number.

399772696 is a deficient number, since it is larger than the sum of its proper divisors (360722984).

399772696 is a wasteful number, since it uses less digits than its factorization.

399772696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275 (or 2271 counting only the distinct ones).

The product of its digits is 7715736, while the sum is 58.

The square root of 399772696 is about 19994.3165924720. The cubic root of 399772696 is about 736.6667074339. Note that the first 3 decimals are identical.

The spelling of 399772696 in words is "three hundred ninety-nine million, seven hundred seventy-two thousand, six hundred ninety-six".