398679116780 has 24 divisors (see below), whose sum is σ = 956829880608. Its totient is φ = 136689982848.

The previous prime is 398679116761. The next prime is 398679116813. The reversal of 398679116780 is 87611976893.

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 7 ways as a sum of consecutive naturals, for example, 1423853849 + ... + 1423854128.

It is an arithmetic number, because the mean of its divisors is an integer number (39867911692).

Almost surely, 2^398679116780 is an apocalyptic number.

It is an amenable number.

398679116780 is an abundant number, since it is smaller than the sum of its proper divisors (558150763828).

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

398679116780 is a wasteful number, since it uses less digits than its factorization.

398679116780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847707993 (or 2847707991 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 65.

The spelling of 398679116780 in words is "three hundred ninety-eight billion, six hundred seventy-nine million, one hundred sixteen thousand, seven hundred eighty".