398962931 has 8 divisors (see below), whose sum is σ = 428897280. Its totient is φ = 369922248.

The previous prime is 398962913. The next prime is 398962951. The reversal of 398962931 is 139269893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-398962931 is a prime.

It is a super-2 number, since 2×398962931² = 318342840624221522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398962931.

It is not an unprimeable number, because it can be changed into a prime (398962951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222491 + ... + 224276.

It is an arithmetic number, because the mean of its divisors is an integer number (53612160).

Almost surely, 2^398962931 is an apocalyptic number.

398962931 is a deficient number, since it is larger than the sum of its proper divisors (29934349).

398962931 is a wasteful number, since it uses less digits than its factorization.

398962931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446833.

The product of its digits is 629856, while the sum is 50.

The square root of 398962931 is about 19974.0564483031. The cubic root of 398962931 is about 736.1689828153.

The spelling of 398962931 in words is "three hundred ninety-eight million, nine hundred sixty-two thousand, nine hundred thirty-one".