399009730560 has 832 divisors, whose sum is σ = 1508255354880. Its totient is φ = 88190484480.

The previous prime is 399009730541. The next prime is 399009730579. The reversal of 399009730560 is 65037900993.

It is an interprime number because it is at equal distance from previous prime (399009730541) and next prime (399009730579).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2229104551 + ... + 2229104729.

Almost surely, 2^399009730560 is an apocalyptic number.

399009730560 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 399009730560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754127677440).

399009730560 is an abundant number, since it is smaller than the sum of its proper divisors (1109245624320).

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

399009730560 is a wasteful number, since it uses less digits than its factorization.

399009730560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 51.

The spelling of 399009730560 in words is "three hundred ninety-nine billion, nine million, seven hundred thirty thousand, five hundred sixty".