99924780 has 72 divisors (see below), whose sum is σ = 289272816. Its totient is φ = 25772160.

The previous prime is 99924767. The next prime is 99924787. The reversal of 99924780 is 8742999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99924787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56794 + ... + 58526.

It is an arithmetic number, because the mean of its divisors is an integer number (4017678).

Almost surely, 2^99924780 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 99924780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144636408).

99924780 is an abundant number, since it is smaller than the sum of its proper divisors (189348036).

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

99924780 is a wasteful number, since it uses less digits than its factorization.

99924780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 99924780 is about 9996.2382924778. The cubic root of 99924780 is about 464.0424740647.

The spelling of 99924780 in words is "ninety-nine million, nine hundred twenty-four thousand, seven hundred eighty".