99685644 has 24 divisors (see below), whose sum is σ = 240621360. Its totient is φ = 32082624.

The previous prime is 99685631. The next prime is 99685669. The reversal of 99685644 is 44658699.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142879 + ... + 143574.

It is an arithmetic number, because the mean of its divisors is an integer number (10025890).

Almost surely, 2^99685644 is an apocalyptic number.

It is an amenable number.

99685644 is an abundant number, since it is smaller than the sum of its proper divisors (140935716).

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

99685644 is a wasteful number, since it uses less digits than its factorization.

99685644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286489 (or 286487 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 99685644 is about 9984.2698280846. The cubic root of 99685644 is about 463.6720023913.

The spelling of 99685644 in words is "ninety-nine million, six hundred eighty-five thousand, six hundred forty-four".