1099185872 has 20 divisors (see below), whose sum is σ = 2241761280. Its totient is φ = 520666848.

The previous prime is 1099185833. The next prime is 1099185877. The reversal of 1099185872 is 2785819901.

It is a self number, because there is not a number n which added to its sum of digits gives 1099185872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099185877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807568 + ... + 1808175.

It is an arithmetic number, because the mean of its divisors is an integer number (112088064).

Almost surely, 2^1099185872 is an apocalyptic number.

It is an amenable number.

1099185872 is an abundant number, since it is smaller than the sum of its proper divisors (1142575408).

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

1099185872 is a wasteful number, since it uses less digits than its factorization.

1099185872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615770 (or 3615764 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 1099185872 is about 33153.9721903726. The cubic root of 1099185872 is about 1032.0253834672.

The spelling of 1099185872 in words is "one billion, ninety-nine million, one hundred eighty-five thousand, eight hundred seventy-two".