398912873138 has 48 divisors (see below), whose sum is σ = 678003088896. Its totient is φ = 175733400960.

The previous prime is 398912873071. The next prime is 398912873153. The reversal of 398912873138 is 831378219893.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 504131 + ... + 1025657.

It is an arithmetic number, because the mean of its divisors is an integer number (14125064352).

Almost surely, 2^398912873138 is an apocalyptic number.

398912873138 is a deficient number, since it is larger than the sum of its proper divisors (279090215758).

398912873138 is a wasteful number, since it uses less digits than its factorization.

398912873138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521659 (or 521646 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 62.

The spelling of 398912873138 in words is "three hundred ninety-eight billion, nine hundred twelve million, eight hundred seventy-three thousand, one hundred thirty-eight".