399999712 has 24 divisors (see below), whose sum is σ = 899999856. Its totient is φ = 171428352.

The previous prime is 399999709. The next prime is 399999737. The reversal of 399999712 is 217999993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892633 + ... + 893080.

It is an arithmetic number, because the mean of its divisors is an integer number (37499994).

Almost surely, 2^399999712 is an apocalyptic number.

399999712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399999712 is an abundant number, since it is smaller than the sum of its proper divisors (500000144).

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

399999712 is a wasteful number, since it uses less digits than its factorization.

399999712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785730 (or 1785722 counting only the distinct ones).

The product of its digits is 2480058, while the sum is 58.

The square root of 399999712 is about 19999.9927999987. The cubic root of 399999712 is about 736.8061228945.

The spelling of 399999712 in words is "three hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred twelve".