399606912 has 128 divisors (see below), whose sum is σ = 1207272000. Its totient is φ = 130056192.

The previous prime is 399606901. The next prime is 399606929. The reversal of 399606912 is 219606993.

It is a happy number.

399606912 is a `hidden beast` number, since 39 + 9 + 606 + 9 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147264 + ... + 149952.

Almost surely, 2^399606912 is an apocalyptic number.

399606912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399606912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603636000).

399606912 is an abundant number, since it is smaller than the sum of its proper divisors (807665088).

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

399606912 is a wasteful number, since it uses less digits than its factorization.

399606912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 399606912 is about 19990.1703844665. The cubic root of 399606912 is about 736.5648625268.

The spelling of 399606912 in words is "three hundred ninety-nine million, six hundred six thousand, nine hundred twelve".