398878837047 has 20 divisors (see below), whose sum is σ = 596102250480. Its totient is φ = 265809345984.

The previous prime is 398878837031. The next prime is 398878837067. The reversal of 398878837047 is 740738878893.

It is not a de Polignac number, because 398878837047 - 2⁴ = 398878837031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398878837067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 819922 + ... + 1212447.

It is an arithmetic number, because the mean of its divisors is an integer number (29805112524).

Almost surely, 2^398878837047 is an apocalyptic number.

398878837047 is a deficient number, since it is larger than the sum of its proper divisors (197223413433).

398878837047 is a wasteful number, since it uses less digits than its factorization.

398878837047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034804 (or 2034795 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 72.

The spelling of 398878837047 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, eight hundred thirty-seven thousand, forty-seven".