398761668312 has 64 divisors (see below), whose sum is σ = 1148290129920. Its totient is φ = 113034797568.

The previous prime is 398761668247. The next prime is 398761668329. The reversal of 398761668312 is 213866167893.

It is a super-2 number, since 2×398761668312² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9323473 + ... + 9366144.

It is an arithmetic number, because the mean of its divisors is an integer number (17942033280).

Almost surely, 2^398761668312 is an apocalyptic number.

It is an amenable number.

398761668312 is an abundant number, since it is smaller than the sum of its proper divisors (749528461608).

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

398761668312 is a wasteful number, since it uses less digits than its factorization.

398761668312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18689760 (or 18689756 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The spelling of 398761668312 in words is "three hundred ninety-eight billion, seven hundred sixty-one million, six hundred sixty-eight thousand, three hundred twelve".