99972844 has 24 divisors (see below), whose sum is σ = 178437168. Its totient is φ = 48998400.

The previous prime is 99972823. The next prime is 99972857. The reversal of 99972844 is 44827999.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 99972791 and 99972800.

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, 61644 + ... + 63244.

It is an arithmetic number, because the mean of its divisors is an integer number (7434882).

Almost surely, 2^99972844 is an apocalyptic number.

It is an amenable number.

99972844 is a deficient number, since it is larger than the sum of its proper divisors (78464324).

99972844 is a wasteful number, since it uses less digits than its factorization.

99972844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1903 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 99972844 is about 9998.6421078064. The cubic root of 99972844 is about 464.1168638953.

The spelling of 99972844 in words is "ninety-nine million, nine hundred seventy-two thousand, eight hundred forty-four".