398017980396 has 36 divisors (see below), whose sum is σ = 1027507414752. Its totient is φ = 129849837024.

The previous prime is 398017980391. The next prime is 398017980401. The reversal of 398017980396 is 693089710893.

It is an interprime number because it is at equal distance from previous prime (398017980391) and next prime (398017980401).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (398017980391) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 117615915 + ... + 117619298.

It is an arithmetic number, because the mean of its divisors is an integer number (28541872632).

Almost surely, 2^398017980396 is an apocalyptic number.

398017980396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

398017980396 is an abundant number, since it is smaller than the sum of its proper divisors (629489434356).

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

398017980396 is a wasteful number, since it uses less digits than its factorization.

398017980396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235235270 (or 235235265 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 398017980396 in words is "three hundred ninety-eight billion, seventeen million, nine hundred eighty thousand, three hundred ninety-six".