99840572 has 12 divisors (see below), whose sum is σ = 188161176. Its totient is φ = 46080240.

The previous prime is 99840569. The next prime is 99840583. The reversal of 99840572 is 27504899.

It is a happy number.

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, 959954 + ... + 960057.

It is an arithmetic number, because the mean of its divisors is an integer number (15680098).

Almost surely, 2^99840572 is an apocalyptic number.

It is an amenable number.

99840572 is a deficient number, since it is larger than the sum of its proper divisors (88320604).

99840572 is a wasteful number, since it uses less digits than its factorization.

99840572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920028 (or 1920026 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 99840572 is about 9992.0254203039. The cubic root of 99840572 is about 463.9120857518.

The spelling of 99840572 in words is "ninety-nine million, eight hundred forty thousand, five hundred seventy-two".