99765138 has 32 divisors (see below), whose sum is σ = 218661120. Its totient is φ = 30094160.

The previous prime is 99765109. The next prime is 99765139. The reversal of 99765138 is 83156799.

It is not an unprimeable number, because it can be changed into a prime (99765139) 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, 11653 + ... + 18311.

It is an arithmetic number, because the mean of its divisors is an integer number (6833160).

Almost surely, 2^99765138 is an apocalyptic number.

99765138 is an abundant number, since it is smaller than the sum of its proper divisors (118895982).

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

99765138 is a wasteful number, since it uses less digits than its factorization.

99765138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902.

The product of its digits is 408240, while the sum is 48.

The square root of 99765138 is about 9988.2499968713. The cubic root of 99765138 is about 463.7952208987.

The spelling of 99765138 in words is "ninety-nine million, seven hundred sixty-five thousand, one hundred thirty-eight".