1089972268 has 72 divisors (see below), whose sum is σ = 2450153664. Its totient is φ = 419479200.

The previous prime is 1089972263. The next prime is 1089972283. The reversal of 1089972268 is 8622799801.

It is not an unprimeable number, because it can be changed into a prime (1089972263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175903 + ... + 181993.

It is an arithmetic number, because the mean of its divisors is an integer number (34029912).

Almost surely, 2^1089972268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089972268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225076832).

1089972268 is an abundant number, since it is smaller than the sum of its proper divisors (1360181396).

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

1089972268 is a wasteful number, since it uses less digits than its factorization.

1089972268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6203 (or 6194 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 1089972268 is about 33014.7280467370. The cubic root of 1089972268 is about 1029.1337386140.

The spelling of 1089972268 in words is "one billion, eighty-nine million, nine hundred seventy-two thousand, two hundred sixty-eight".