398279279172 has 12 divisors (see below), whose sum is σ = 929318318096. Its totient is φ = 132759759720.

The previous prime is 398279279059. The next prime is 398279279179. The reversal of 398279279172 is 271972972893.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (398279279179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16594969954 + ... + 16594969977.

Almost surely, 2^398279279172 is an apocalyptic number.

It is an amenable number.

398279279172 is an abundant number, since it is smaller than the sum of its proper divisors (531039038924).

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

398279279172 is a wasteful number, since it uses less digits than its factorization.

398279279172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33189939938 (or 33189939936 counting only the distinct ones).

The product of its digits is 48009024, while the sum is 66.

The spelling of 398279279172 in words is "three hundred ninety-eight billion, two hundred seventy-nine million, two hundred seventy-nine thousand, one hundred seventy-two".