399240056704 has 16 divisors (see below), whose sum is σ = 795361050720. Its totient is φ = 199620028288.

The previous prime is 399240056693. The next prime is 399240056713. The reversal of 399240056704 is 407650042993.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1559531344 + ... + 1559531599.

It is an arithmetic number, because the mean of its divisors is an integer number (49710065670).

Almost surely, 2^399240056704 is an apocalyptic number.

It is an amenable number.

399240056704 is a deficient number, since it is larger than the sum of its proper divisors (396120994016).

399240056704 is an equidigital number, since it uses as much as digits as its factorization.

399240056704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119062957 (or 3119062945 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 399240056704 in words is "three hundred ninety-nine billion, two hundred forty million, fifty-six thousand, seven hundred four".