1089597312 has 128 divisors (see below), whose sum is σ = 3303127200. Its totient is φ = 353341440.

The previous prime is 1089597307. The next prime is 1089597319. The reversal of 1089597312 is 2137959801.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089597319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123612 + ... + 132132.

Almost surely, 2^1089597312 is an apocalyptic number.

1089597312 is a gapful number since it is divisible by the number (12) 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 1089597312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651563600).

1089597312 is an abundant number, since it is smaller than the sum of its proper divisors (2213529888).

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

1089597312 is an equidigital number, since it uses as much as digits as its factorization.

1089597312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8581 (or 8563 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1089597312 is about 33009.0489411616. The cubic root of 1089597312 is about 1029.0157160006.

The spelling of 1089597312 in words is "one billion, eighty-nine million, five hundred ninety-seven thousand, three hundred twelve".