398878830321 has 16 divisors (see below), whose sum is σ = 535439984640. Its totient is φ = 264124212480.

The previous prime is 398878830313. The next prime is 398878830341. The reversal of 398878830321 is 123038878893.

It is not a de Polignac number, because 398878830321 - 2³ = 398878830313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398878830341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443326 + ... + 997143.

It is an arithmetic number, because the mean of its divisors is an integer number (33464999040).

Almost surely, 2^398878830321 is an apocalyptic number.

It is an amenable number.

398878830321 is a deficient number, since it is larger than the sum of its proper divisors (136561154319).

398878830321 is a wasteful number, since it uses less digits than its factorization.

398878830321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441096.

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 398878830321 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, eight hundred thirty thousand, three hundred twenty-one".