99099040 has 36 divisors (see below), whose sum is σ = 234419346. Its totient is φ = 39589248.

The previous prime is 99098957. The next prime is 99099043. The reversal of 99099040 is 4099099.

It can be written as a sum of positive squares in only one way, i.e., 89189136 + 9909904 = 9444^2 + 3148^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 99098984 and 99099002.

It is not an unprimeable number, because it can be changed into a prime (99099043) 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, 125527 + ... + 126313.

Almost surely, 2^99099040 is an apocalyptic number.

It is an amenable number.

99099040 is an abundant number, since it is smaller than the sum of its proper divisors (135320306).

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

99099040 is an frugal number, since it uses more digits than its factorization.

99099040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 99099040 is about 9954.8500742101. The cubic root of 99099040 is about 462.7607139755.

Multiplying 99099040 by its sum of digits (40), we get a square (3963961600 = 62960²).

99099040 divided by its sum of digits (40) gives a square (2477476 = 1574²).

The spelling of 99099040 in words is "ninety-nine million, ninety-nine thousand, forty".