99021944 has 24 divisors (see below), whose sum is σ = 215979840. Its totient is φ = 42437808.

The previous prime is 99021943. The next prime is 99021961. The reversal of 99021944 is 44912099.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 99021898 and 99021907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125912 + ... + 126695.

It is an arithmetic number, because the mean of its divisors is an integer number (8999160).

Almost surely, 2^99021944 is an apocalyptic number.

It is an amenable number.

99021944 is an abundant number, since it is smaller than the sum of its proper divisors (116957896).

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

99021944 is a wasteful number, since it uses less digits than its factorization.

99021944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252627 (or 252616 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 99021944 is about 9950.9770374572. The cubic root of 99021944 is about 462.6406783159.

The spelling of 99021944 in words is "ninety-nine million, twenty-one thousand, nine hundred forty-four".