399972885908 has 6 divisors (see below), whose sum is σ = 699952550346. Its totient is φ = 199986442952.

The previous prime is 399972885797. The next prime is 399972885913. The reversal of 399972885908 is 809588279993.

It can be written as a sum of positive squares in only one way, i.e., 392161507984 + 7811377924 = 626228^2 + 88382^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49996610735 + ... + 49996610742.

It is an arithmetic number, because the mean of its divisors is an integer number (116658758391).

Almost surely, 2^399972885908 is an apocalyptic number.

It is an amenable number.

399972885908 is a deficient number, since it is larger than the sum of its proper divisors (299979664438).

399972885908 is a wasteful number, since it uses less digits than its factorization.

399972885908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99993221481 (or 99993221479 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 77.

The spelling of 399972885908 in words is "three hundred ninety-nine billion, nine hundred seventy-two million, eight hundred eighty-five thousand, nine hundred eight".