399240056624 has 20 divisors (see below), whose sum is σ = 798480114240. Its totient is φ = 193180672320.

The previous prime is 399240056623. The next prime is 399240056647. The reversal of 399240056624 is 426650042993.

399240056624 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (399240056623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402459239 + ... + 402460230.

It is an arithmetic number, because the mean of its divisors is an integer number (39924005712).

Almost surely, 2^399240056624 is an apocalyptic number.

It is an amenable number.

399240056624 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

399240056624 is a wasteful number, since it uses less digits than its factorization.

399240056624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804919508 (or 804919502 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 399240056624 in words is "three hundred ninety-nine billion, two hundred forty million, fifty-six thousand, six hundred twenty-four".