99640938 has 24 divisors (see below), whose sum is σ = 202647744. Its totient is φ = 32661840.

The previous prime is 99640909. The next prime is 99640939. The reversal of 99640938 is 83904699.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99640939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20095 + ... + 24557.

It is an arithmetic number, because the mean of its divisors is an integer number (8443656).

Almost surely, 2^99640938 is an apocalyptic number.

99640938 is an abundant number, since it is smaller than the sum of its proper divisors (103006806).

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

99640938 is a wasteful number, since it uses less digits than its factorization.

99640938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4590 (or 4529 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 99640938 is about 9982.0307553123. The cubic root of 99640938 is about 463.6026777315.

The spelling of 99640938 in words is "ninety-nine million, six hundred forty thousand, nine hundred thirty-eight".