398789878980 has 24 divisors (see below), whose sum is σ = 1116611661312. Its totient is φ = 106343967712.

The previous prime is 398789878913. The next prime is 398789879003. The reversal of 398789878980 is 89878987893.

It is a junction number, because it is equal to n+sod(n) for n = 398789878893 and 398789878902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3323248932 + ... + 3323249051.

It is an arithmetic number, because the mean of its divisors is an integer number (46525485888).

Almost surely, 2^398789878980 is an apocalyptic number.

398789878980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398789878980 is an abundant number, since it is smaller than the sum of its proper divisors (717821782332).

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

398789878980 is a wasteful number, since it uses less digits than its factorization.

398789878980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646497995 (or 6646497993 counting only the distinct ones).

The product of its (nonzero) digits is 3511517184, while the sum is 84.

The spelling of 398789878980 in words is "three hundred ninety-eight billion, seven hundred eighty-nine million, eight hundred seventy-eight thousand, nine hundred eighty".