9904021980 has 48 divisors (see below), whose sum is σ = 28625823744. Its totient is φ = 2555876160.

The previous prime is 9904021877. The next prime is 9904021997. The reversal of 9904021980 is 891204099.

9904021980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2660512 + ... + 2664231.

It is an arithmetic number, because the mean of its divisors is an integer number (596371328).

Almost surely, 2^9904021980 is an apocalyptic number.

It is an amenable number.

9904021980 is an abundant number, since it is smaller than the sum of its proper divisors (18721801764).

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

9904021980 is a wasteful number, since it uses less digits than its factorization.

9904021980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324786 (or 5324784 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 9904021980 is about 99518.9528682853. The cubic root of 9904021980 is about 2147.5199078584.

The spelling of 9904021980 in words is "nine billion, nine hundred four million, twenty-one thousand, nine hundred eighty".