1089880200 has 144 divisors (see below), whose sum is σ = 3875594580. Its totient is φ = 273530880.

The previous prime is 1089880171. The next prime is 1089880201. The reversal of 1089880200 is 20889801.

It can be written as a sum of positive squares in 6 ways, for example, as 476723556 + 613156644 = 21834^2 + 24762^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1089880201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12792 + ... + 48408.

Almost surely, 2^1089880200 is an apocalyptic number.

1089880200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089880200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937797290).

1089880200 is an abundant number, since it is smaller than the sum of its proper divisors (2785714380).

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

1089880200 is a wasteful number, since it uses less digits than its factorization.

1089880200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35656 (or 35644 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1089880200 is about 33013.3336698977. Note that the first 3 decimals coincide. The cubic root of 1089880200 is about 1029.1047614386.

The spelling of 1089880200 in words is "one billion, eighty-nine million, eight hundred eighty thousand, two hundred".