99641388 has 48 divisors (see below), whose sum is σ = 289868544. Its totient is φ = 25880640.

The previous prime is 99641387. The next prime is 99641413. The reversal of 99641388 is 88314699.

It is not an unprimeable number, because it can be changed into a prime (99641387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52995 + ... + 54842.

It is an arithmetic number, because the mean of its divisors is an integer number (6038928).

Almost surely, 2^99641388 is an apocalyptic number.

It is an amenable number.

99641388 is an abundant number, since it is smaller than the sum of its proper divisors (190227156).

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

99641388 is a wasteful number, since it uses less digits than its factorization.

99641388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107862 (or 107860 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 99641388 is about 9982.0532957904. The cubic root of 99641388 is about 463.6033756404.

The spelling of 99641388 in words is "ninety-nine million, six hundred forty-one thousand, three hundred eighty-eight".