99638924 has 48 divisors (see below), whose sum is σ = 219614976. Its totient is φ = 38424000.

The previous prime is 99638911. The next prime is 99638939. The reversal of 99638924 is 42983699.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29507 + ... + 32709.

It is an arithmetic number, because the mean of its divisors is an integer number (4575312).

Almost surely, 2^99638924 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 99638924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109807488).

99638924 is an abundant number, since it is smaller than the sum of its proper divisors (119976052).

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

99638924 is a wasteful number, since it uses less digits than its factorization.

99638924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326 (or 3324 counting only the distinct ones).

The product of its digits is 839808, while the sum is 50.

The square root of 99638924 is about 9981.9298735265. The cubic root of 99638924 is about 463.5995541758.

The spelling of 99638924 in words is "ninety-nine million, six hundred thirty-eight thousand, nine hundred twenty-four".