398878098186 has 8 divisors (see below), whose sum is σ = 797756196384. Its totient is φ = 132959366060.

The previous prime is 398878098097. The next prime is 398878098187. The reversal of 398878098186 is 681890878893.

It is a sphenic number, since it is the product of 3 distinct primes.

398878098186 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (398878098187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33239841510 + ... + 33239841521.

It is an arithmetic number, because the mean of its divisors is an integer number (99719524548).

Almost surely, 2^398878098186 is an apocalyptic number.

398878098186 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

398878098186 is a wasteful number, since it uses less digits than its factorization.

398878098186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66479683036.

The product of its (nonzero) digits is 334430208, while the sum is 75.

The spelling of 398878098186 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, ninety-eight thousand, one hundred eighty-six".