99870844 has 24 divisors (see below), whose sum is σ = 180488448. Its totient is φ = 48317760.

The previous prime is 99870833. The next prime is 99870857. The reversal of 99870844 is 44807899.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26502 + ... + 30034.

It is an arithmetic number, because the mean of its divisors is an integer number (7520352).

Almost surely, 2^99870844 is an apocalyptic number.

It is an amenable number.

99870844 is a deficient number, since it is larger than the sum of its proper divisors (80617604).

99870844 is a wasteful number, since it uses less digits than its factorization.

99870844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765 (or 3763 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 99870844 is about 9993.5401134933. The cubic root of 99870844 is about 463.9589675864.

The spelling of 99870844 in words is "ninety-nine million, eight hundred seventy thousand, eight hundred forty-four".