99640472 has 16 divisors (see below), whose sum is σ = 188082000. Its totient is φ = 49485280.

The previous prime is 99640469. The next prime is 99640481. The reversal of 99640472 is 27404699.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40604 + ... + 42987.

It is an arithmetic number, because the mean of its divisors is an integer number (11755125).

Almost surely, 2^99640472 is an apocalyptic number.

It is an amenable number.

99640472 is a deficient number, since it is larger than the sum of its proper divisors (88441528).

99640472 is a wasteful number, since it uses less digits than its factorization.

99640472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83746 (or 83742 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 99640472 is about 9982.0074133413. The cubic root of 99640472 is about 463.6019550059.

The spelling of 99640472 in words is "ninety-nine million, six hundred forty thousand, four hundred seventy-two".