399924672 has 84 divisors (see below), whose sum is σ = 1230919560. Its totient is φ = 114261504.

The previous prime is 399924661. The next prime is 399924683. The reversal of 399924672 is 276429993.

It is an interprime number because it is at equal distance from previous prime (399924661) and next prime (399924683).

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11847 + ... + 30662.

Almost surely, 2^399924672 is an apocalyptic number.

399924672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399924672 is an abundant number, since it is smaller than the sum of its proper divisors (830994888).

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

399924672 is a wasteful number, since it uses less digits than its factorization.

399924672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42538 (or 42521 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 51.

The square root of 399924672 is about 19998.1167113306. The cubic root of 399924672 is about 736.7600450369.

The spelling of 399924672 in words is "three hundred ninety-nine million, nine hundred twenty-four thousand, six hundred seventy-two".