1089888900 has 36 divisors (see below), whose sum is σ = 3153412752. Its totient is φ = 290636960.

The previous prime is 1089888889. The next prime is 1089888901. The reversal of 1089888900 is 98889801.

It is not an unprimeable number, because it can be changed into a prime (1089888901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1816182 + ... + 1816781.

Almost surely, 2^1089888900 is an apocalyptic number.

1089888900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089888900 is an abundant number, since it is smaller than the sum of its proper divisors (2063523852).

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

1089888900 is a wasteful number, since it uses less digits than its factorization.

1089888900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632980 (or 3632973 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 51.

The square root of 1089888900 is about 33013.4654345768. The cubic root of 1089888900 is about 1029.1074997174.

Subtracting from 1089888900 its reverse (98889801), we obtain a palindrome (990999099).

The spelling of 1089888900 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, nine hundred".