398840672832 has 84 divisors (see below), whose sum is σ = 1227554293680. Its totient is φ = 113954475264.

The previous prime is 398840672831. The next prime is 398840672843. The reversal of 398840672832 is 238276048893.

It is a tau number, because it is divible by the number of its divisors (84).

It is not an unprimeable number, because it can be changed into a prime (398840672831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21187482 + ... + 21206297.

Almost surely, 2^398840672832 is an apocalyptic number.

398840672832 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

398840672832 is an abundant number, since it is smaller than the sum of its proper divisors (828713620848).

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

398840672832 is a wasteful number, since it uses less digits than its factorization.

398840672832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42393808 (or 42393791 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 60.

The spelling of 398840672832 in words is "three hundred ninety-eight billion, eight hundred forty million, six hundred seventy-two thousand, eight hundred thirty-two".