99811044 has 18 divisors (see below), whose sum is σ = 252300230. Its totient is φ = 33270336.

The previous prime is 99811043. The next prime is 99811051. The reversal of 99811044 is 44011899.

It can be written as a sum of positive squares in only one way, i.e., 75898944 + 23912100 = 8712^2 + 4890^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2772529 = 99811044 / (9 + 9 + 8 + 1 + 1 + 0 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (99811043) 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, 1386229 + ... + 1386300.

Almost surely, 2^99811044 is an apocalyptic number.

It is an amenable number.

99811044 is an abundant number, since it is smaller than the sum of its proper divisors (152489186).

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

99811044 is a wasteful number, since it uses less digits than its factorization.

99811044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772539 (or 2772534 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 99811044 is about 9990.5477327322. The cubic root of 99811044 is about 463.8663470090.

It can be divided in two parts, 9981 and 1044, that added together give a square (11025 = 105²).

The spelling of 99811044 in words is "ninety-nine million, eight hundred eleven thousand, forty-four".