399711351812 has 12 divisors (see below), whose sum is σ = 702496991196. Its totient is φ = 198997925760.

The previous prime is 399711351797. The next prime is 399711351839. The reversal of 399711351812 is 218153117993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31291487236 + 368419864576 = 176894^2 + 606976^2 .

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, 214436489 + ... + 214438352.

It is an arithmetic number, because the mean of its divisors is an integer number (58541415933).

Almost surely, 2^399711351812 is an apocalyptic number.

It is an amenable number.

399711351812 is a deficient number, since it is larger than the sum of its proper divisors (302785639384).

399711351812 is a wasteful number, since it uses less digits than its factorization.

399711351812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428875078 (or 428875076 counting only the distinct ones).

The product of its digits is 408240, while the sum is 50.

The spelling of 399711351812 in words is "three hundred ninety-nine billion, seven hundred eleven million, three hundred fifty-one thousand, eight hundred twelve".