399300865920 has 768 divisors, whose sum is σ = 1576021224960. Its totient is φ = 95800320000.

The previous prime is 399300865919. The next prime is 399300865987. The reversal of 399300865920 is 29568003993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 172781565 + ... + 172783875.

It is an arithmetic number, because the mean of its divisors is an integer number (2052110970).

Almost surely, 2^399300865920 is an apocalyptic number.

399300865920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399300865920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788010612480).

399300865920 is an abundant number, since it is smaller than the sum of its proper divisors (1176720359040).

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

399300865920 is a wasteful number, since it uses less digits than its factorization.

399300865920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457 (or 2433 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 399300865920 in words is "three hundred ninety-nine billion, three hundred million, eight hundred sixty-five thousand, nine hundred twenty".