9121394880 has 672 divisors, whose sum is σ = 36942857280. Its totient is φ = 2105671680.

The previous prime is 9121394873. The next prime is 9121394881. The reversal of 9121394880 is 884931219.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121394881) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32460340 + ... + 32460620.

It is an arithmetic number, because the mean of its divisors is an integer number (54974490).

Almost surely, 2^9121394880 is an apocalyptic number.

9121394880 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 9121394880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18471428640).

9121394880 is an abundant number, since it is smaller than the sum of its proper divisors (27821462400).

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

9121394880 is a wasteful number, since it uses less digits than its factorization.

9121394880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 9121394880 is about 95505.9939480240. The cubic root of 9121394880 is about 2089.3943652410.

The spelling of 9121394880 in words is "nine billion, one hundred twenty-one million, three hundred ninety-four thousand, eight hundred eighty".