398882179991 has 32 divisors (see below), whose sum is σ = 415597495296. Its totient is φ = 382631040000.

The previous prime is 398882179967. The next prime is 398882180003. The reversal of 398882179991 is 199971288893.

It is a de Polignac number, because none of the positive numbers 2^k-398882179991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398882170991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217848446 + ... + 217850276.

It is an arithmetic number, because the mean of its divisors is an integer number (12987421728).

Almost surely, 2^398882179991 is an apocalyptic number.

398882179991 is a deficient number, since it is larger than the sum of its proper divisors (16715315305).

398882179991 is a wasteful number, since it uses less digits than its factorization.

398882179991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463.

The product of its digits is 141087744, while the sum is 74.

The spelling of 398882179991 in words is "three hundred ninety-eight billion, eight hundred eighty-two million, one hundred seventy-nine thousand, nine hundred ninety-one".