99555872 has 72 divisors (see below), whose sum is σ = 217898100. Its totient is φ = 44728320.

The previous prime is 99555857. The next prime is 99555899. The reversal of 99555872 is 27855599.

It can be written as a sum of positive squares in 6 ways, for example, as 2808976 + 96746896 = 1676^2 + 9836^2 .

It is a super-2 number, since 2×99555872² = 19822743299360768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99555872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221504 + ... + 221952.

Almost surely, 2^99555872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99555872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108949050).

99555872 is an abundant number, since it is smaller than the sum of its proper divisors (118342228).

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

99555872 is a wasteful number, since it uses less digits than its factorization.

99555872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 505 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 50.

The square root of 99555872 is about 9977.7688888849. The cubic root of 99555872 is about 463.4707103754.

The spelling of 99555872 in words is "ninety-nine million, five hundred fifty-five thousand, eight hundred seventy-two".