99790720 has 64 divisors (see below), whose sum is σ = 244445040. Its totient is φ = 38932480.

The previous prime is 99790709. The next prime is 99790751. The reversal of 99790720 is 2709799.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24339 + ... + 28141.

Almost surely, 2^99790720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99790720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122222520).

99790720 is an abundant number, since it is smaller than the sum of its proper divisors (144654320).

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

99790720 is a wasteful number, since it uses less digits than its factorization.

99790720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863 (or 3851 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 99790720 is about 9989.5305194989. The cubic root of 99790720 is about 463.8348599803.

The spelling of 99790720 in words is "ninety-nine million, seven hundred ninety thousand, seven hundred twenty".