398191974912 has 120 divisors (see below), whose sum is σ = 1160367752544. Its totient is φ = 131441854464.

The previous prime is 398191974907. The next prime is 398191974919. The reversal of 398191974912 is 219479191893.

It is a happy number.

398191974912 is a `hidden beast` number, since 398 + 1 + 9 + 197 + 49 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 398191974912.

It is not an unprimeable number, because it can be changed into a prime (398191974919) 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, 55143 + ... + 894105.

Almost surely, 2^398191974912 is an apocalyptic number.

398191974912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398191974912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580183876272).

398191974912 is an abundant number, since it is smaller than the sum of its proper divisors (762175777632).

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

398191974912 is a wasteful number, since it uses less digits than its factorization.

398191974912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839090 (or 839071 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The spelling of 398191974912 in words is "three hundred ninety-eight billion, one hundred ninety-one million, nine hundred seventy-four thousand, nine hundred twelve".