398879366886 has 192 divisors, whose sum is σ = 1188680403456. Its totient is φ = 93302668800.

The previous prime is 398879366867. The next prime is 398879366909. The reversal of 398879366886 is 688663978893.

398879366886 is a `hidden beast` number, since 39 + 88 + 79 + 366 + 8 + 86 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 468765 + ... + 1008711.

It is an arithmetic number, because the mean of its divisors is an integer number (6191043768).

Almost surely, 2^398879366886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398879366886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594340201728).

398879366886 is an abundant number, since it is smaller than the sum of its proper divisors (789801036570).

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

398879366886 is a wasteful number, since it uses less digits than its factorization.

398879366886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540027 (or 540024 counting only the distinct ones).

The product of its digits is 4514807808, while the sum is 81.

The spelling of 398879366886 in words is "three hundred ninety-eight billion, eight hundred seventy-nine million, three hundred sixty-six thousand, eight hundred eighty-six".