9902099880 has 256 divisors, whose sum is σ = 34268832000. Its totient is φ = 2540289024.

The previous prime is 9902099873. The next prime is 9902099969. The reversal of 9902099880 is 889902099.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14626102 + ... + 14626778.

It is an arithmetic number, because the mean of its divisors is an integer number (133862625).

Almost surely, 2^9902099880 is an apocalyptic number.

9902099880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9902099880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17134416000).

9902099880 is an abundant number, since it is smaller than the sum of its proper divisors (24366732120).

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

9902099880 is a wasteful number, since it uses less digits than its factorization.

9902099880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 9902099880 is about 99509.2954451995. The cubic root of 9902099880 is about 2147.3809738954.

The spelling of 9902099880 in words is "nine billion, nine hundred two million, ninety-nine thousand, eight hundred eighty".