99985844 has 12 divisors (see below), whose sum is σ = 199971744. Its totient is φ = 42851064.

The previous prime is 99985843. The next prime is 99985849. The reversal of 99985844 is 44858999.

99985844 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 99985844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99985843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785434 + ... + 1785489.

It is an arithmetic number, because the mean of its divisors is an integer number (16664312).

Almost surely, 2^99985844 is an apocalyptic number.

It is an amenable number.

99985844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99985844 is a wasteful number, since it uses less digits than its factorization.

99985844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570934 (or 3570932 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 56.

The square root of 99985844 is about 9999.2921749492. The cubic root of 99985844 is about 464.1369802172.

The spelling of 99985844 in words is "ninety-nine million, nine hundred eighty-five thousand, eight hundred forty-four".