99988144 has 20 divisors (see below), whose sum is σ = 199977280. Its totient is φ = 48381120.

The previous prime is 99988139. The next prime is 99988219. The reversal of 99988144 is 44188999.

It is a happy number.

99988144 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 99988091 and 99988100.

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, 100299 + ... + 101290.

It is an arithmetic number, because the mean of its divisors is an integer number (9998864).

Almost surely, 2^99988144 is an apocalyptic number.

It is an amenable number.

99988144 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.

99988144 is a wasteful number, since it uses less digits than its factorization.

99988144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201628 (or 201622 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 99988144 is about 9999.4071824284. The cubic root of 99988144 is about 464.1405390772.

The spelling of 99988144 in words is "ninety-nine million, nine hundred eighty-eight thousand, one hundred forty-four".