399352011520 has 144 divisors (see below), whose sum is σ = 1192610619648. Its totient is φ = 124473323520.

The previous prime is 399352011491. The next prime is 399352011547. The reversal of 399352011520 is 25110253993.

It is a Harshad number since it is a multiple of its sum of digits (40).

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 in 15 ways as a sum of consecutive naturals, for example, 1927374 + ... + 2124493.

It is an arithmetic number, because the mean of its divisors is an integer number (8282018192).

Almost surely, 2^399352011520 is an apocalyptic number.

It is an amenable number.

399352011520 is an abundant number, since it is smaller than the sum of its proper divisors (793258608128).

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

399352011520 is a wasteful number, since it uses less digits than its factorization.

399352011520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051906 (or 4051892 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 399352011520 in words is "three hundred ninety-nine billion, three hundred fifty-two million, eleven thousand, five hundred twenty".