99686636 has 24 divisors (see below), whose sum is σ = 202755840. Its totient is φ = 41998032.

The previous prime is 99686633. The next prime is 99686647. The reversal of 99686636 is 63668699.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99686633) 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, 28520 + ... + 31823.

It is an arithmetic number, because the mean of its divisors is an integer number (8448160).

Almost surely, 2^99686636 is an apocalyptic number.

It is an amenable number.

99686636 is an abundant number, since it is smaller than the sum of its proper divisors (103069204).

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

99686636 is a wasteful number, since it uses less digits than its factorization.

99686636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60413 (or 60411 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 53.

The square root of 99686636 is about 9984.3195061056. The cubic root of 99686636 is about 463.6735404299.

The spelling of 99686636 in words is "ninety-nine million, six hundred eighty-six thousand, six hundred thirty-six".