99644136 has 32 divisors (see below), whose sum is σ = 254413440. Its totient is φ = 32507648.

The previous prime is 99644131. The next prime is 99644141. The reversal of 99644136 is 63144699.

It is an interprime number because it is at equal distance from previous prime (99644131) and next prime (99644141).

It is not an unprimeable number, because it can be changed into a prime (99644131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43041 + ... + 45296.

It is an arithmetic number, because the mean of its divisors is an integer number (7950420).

Almost surely, 2^99644136 is an apocalyptic number.

It is an amenable number.

99644136 is an abundant number, since it is smaller than the sum of its proper divisors (154769304).

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

99644136 is a wasteful number, since it uses less digits than its factorization.

99644136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88393 (or 88389 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 99644136 is about 9982.1909418724. The cubic root of 99644136 is about 463.6076374918.

The spelling of 99644136 in words is "ninety-nine million, six hundred forty-four thousand, one hundred thirty-six".