399702807360 has 336 divisors, whose sum is σ = 1460515597632. Its totient is φ = 103986892800.

The previous prime is 399702807341. The next prime is 399702807377. The reversal of 399702807360 is 63708207993.

It is a super-2 number, since 2×399702807360² (a number of 24 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 399702807297 and 399702807306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3125475 + ... + 3250845.

It is an arithmetic number, because the mean of its divisors is an integer number (4346772612).

Almost surely, 2^399702807360 is an apocalyptic number.

399702807360 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 399702807360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730257798816).

399702807360 is an abundant number, since it is smaller than the sum of its proper divisors (1060812790272).

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

399702807360 is a wasteful number, since it uses less digits than its factorization.

399702807360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125444 (or 125422 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 399702807360 in words is "three hundred ninety-nine billion, seven hundred two million, eight hundred seven thousand, three hundred sixty".