99640624 has 20 divisors (see below), whose sum is σ = 193490344. Its totient is φ = 49707648.

The previous prime is 99640613. The next prime is 99640627. The reversal of 99640624 is 42604699.

It is a super-2 number, since 2×99640624² = 19856507902218752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99640627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499 + ... + 14125.

Almost surely, 2^99640624 is an apocalyptic number.

It is an amenable number.

99640624 is a deficient number, since it is larger than the sum of its proper divisors (93849720).

99640624 is a wasteful number, since it uses less digits than its factorization.

99640624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14092 (or 14086 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 99640624 is about 9982.0150270374. The cubic root of 99640624 is about 463.6021907450.

The spelling of 99640624 in words is "ninety-nine million, six hundred forty thousand, six hundred twenty-four".