99280224 has 72 divisors (see below), whose sum is σ = 292088160. Its totient is φ = 31949568.

The previous prime is 99280199. The next prime is 99280231. The reversal of 99280224 is 42208299.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2409 + ... + 14295.

It is an arithmetic number, because the mean of its divisors is an integer number (4056780).

Almost surely, 2^99280224 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 99280224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146044080).

99280224 is an abundant number, since it is smaller than the sum of its proper divisors (192807936).

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

99280224 is a wasteful number, since it uses less digits than its factorization.

99280224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11932 (or 11921 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 99280224 is about 9963.9462061976. The cubic root of 99280224 is about 463.0425659855.

The spelling of 99280224 in words is "ninety-nine million, two hundred eighty thousand, two hundred twenty-four".