99021648 has 80 divisors (see below), whose sum is σ = 280982016. Its totient is φ = 29800320.

The previous prime is 99021613. The next prime is 99021679. The reversal of 99021648 is 84612099.

It is a congruent number.

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, 87615 + ... + 88737.

Almost surely, 2^99021648 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 99021648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140491008).

99021648 is an abundant number, since it is smaller than the sum of its proper divisors (181960368).

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

99021648 is a wasteful number, since it uses less digits than its factorization.

99021648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 99021648 is about 9950.9621645346. The cubic root of 99021648 is about 462.6402173347.

The spelling of 99021648 in words is "ninety-nine million, twenty-one thousand, six hundred forty-eight".