399789912 has 32 divisors (see below), whose sum is σ = 1000350000. Its totient is φ = 133146624.

The previous prime is 399789899. The next prime is 399789917. The reversal of 399789912 is 219987993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399789917) 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, 23308 + ... + 36644.

Almost surely, 2^399789912 is an apocalyptic number.

It is an amenable number.

399789912 is an abundant number, since it is smaller than the sum of its proper divisors (600560088).

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

399789912 is a wasteful number, since it uses less digits than its factorization.

399789912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14595 (or 14591 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 57.

The square root of 399789912 is about 19994.7471101787. The cubic root of 399789912 is about 736.6772820030.

The spelling of 399789912 in words is "three hundred ninety-nine million, seven hundred eighty-nine thousand, nine hundred twelve".