398669135922 has 54 divisors (see below), whose sum is σ = 884593858941. Its totient is φ = 129761750160.

The previous prime is 398669135861. The next prime is 398669135947. The reversal of 398669135922 is 229531966893.

398669135922 is a `hidden beast` number, since 39 + 8 + 6 + 6 + 9 + 1 + 3 + 592 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 358119661761 + 40549474161 = 598431^2 + 201369^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=446469.

It is a super-2 number, since 2×398669135922² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 398669135922.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 115187272 + ... + 115190732.

Almost surely, 2^398669135922 is an apocalyptic number.

398669135922 is an abundant number, since it is smaller than the sum of its proper divisors (485924723019).

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

398669135922 is an frugal number, since it uses more digits than its factorization.

398669135922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016 (or 3509 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 63.

The spelling of 398669135922 in words is "three hundred ninety-eight billion, six hundred sixty-nine million, one hundred thirty-five thousand, nine hundred twenty-two".