399859240212 has 36 divisors (see below), whose sum is σ = 1010792220256. Its totient is φ = 133281545040.

The previous prime is 399859240201. The next prime is 399859240217. The reversal of 399859240212 is 212042958993.

399859240212 is a `hidden beast` number, since 3 + 9 + 9 + 8 + 592 + 40 + 2 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399859240217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 874887 + ... + 1251057.

Almost surely, 2^399859240212 is an apocalyptic number.

It is an amenable number.

399859240212 is an abundant number, since it is smaller than the sum of its proper divisors (610932980044).

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

399859240212 is a wasteful number, since it uses less digits than its factorization.

399859240212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405708 (or 405703 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 399859240212 in words is "three hundred ninety-nine billion, eight hundred fifty-nine million, two hundred forty thousand, two hundred twelve".