99744220 has 48 divisors (see below), whose sum is σ = 214915680. Its totient is φ = 38872064.

The previous prime is 99744209. The next prime is 99744221. The reversal of 99744220 is 2244799.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99744220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99744221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161352 + ... + 161968.

It is an arithmetic number, because the mean of its divisors is an integer number (4477410).

Almost surely, 2^99744220 is an apocalyptic number.

It is an amenable number.

99744220 is an abundant number, since it is smaller than the sum of its proper divisors (115171460).

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

99744220 is a wasteful number, since it uses less digits than its factorization.

99744220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 99744220 is about 9987.2028115985. The cubic root of 99744220 is about 463.7628036075.

The spelling of 99744220 in words is "ninety-nine million, seven hundred forty-four thousand, two hundred twenty".