398878090692 has 24 divisors (see below), whose sum is σ = 934577441952. Its totient is φ = 132407664000.

The previous prime is 398878090657. The next prime is 398878090739. The reversal of 398878090692 is 296090878893.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68959434 + ... + 68965217.

It is an arithmetic number, because the mean of its divisors is an integer number (38940726748).

Almost surely, 2^398878090692 is an apocalyptic number.

It is an amenable number.

398878090692 is an abundant number, since it is smaller than the sum of its proper divisors (535699351260).

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

398878090692 is a wasteful number, since it uses less digits than its factorization.

398878090692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137924899 (or 137924897 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 69.

The spelling of 398878090692 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, ninety thousand, six hundred ninety-two".