9973998090 has 192 divisors, whose sum is σ = 31624369920. Its totient is φ = 2128988160.

The previous prime is 9973998053. The next prime is 9973998113. The reversal of 9973998090 is 908993799.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1399456 + ... + 1406564.

It is an arithmetic number, because the mean of its divisors is an integer number (164710260).

Almost surely, 2^9973998090 is an apocalyptic number.

9973998090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9973998090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15812184960).

9973998090 is an abundant number, since it is smaller than the sum of its proper divisors (21650371830).

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

9973998090 is a wasteful number, since it uses less digits than its factorization.

9973998090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277 (or 7274 counting only the distinct ones).

The product of its (nonzero) digits is 9920232, while the sum is 63.

The square root of 9973998090 is about 99869.9058275314. The cubic root of 9973998090 is about 2152.5657553352.

The spelling of 9973998090 in words is "nine billion, nine hundred seventy-three million, nine hundred ninety-eight thousand, ninety".