9990879144 has 64 divisors (see below), whose sum is σ = 26205703680. Its totient is φ = 3170016000.

The previous prime is 9990879037. The next prime is 9990879149. The reversal of 9990879144 is 4419780999.

It is not an unprimeable number, because it can be changed into a prime (9990879149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64687 + ... + 155454.

It is an arithmetic number, because the mean of its divisors is an integer number (409464120).

Almost surely, 2^9990879144 is an apocalyptic number.

It is an amenable number.

9990879144 is an abundant number, since it is smaller than the sum of its proper divisors (16214824536).

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

9990879144 is a wasteful number, since it uses less digits than its factorization.

9990879144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220242 (or 220238 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 60.

The square root of 9990879144 is about 99954.3853165032. The cubic root of 9990879144 is about 2153.7794811703.

The spelling of 9990879144 in words is "nine billion, nine hundred ninety million, eight hundred seventy-nine thousand, one hundred forty-four".