1089537280 has 144 divisors (see below), whose sum is σ = 2880887184. Its totient is φ = 392232960.

The previous prime is 1089537277. The next prime is 1089537289. The reversal of 1089537280 is 827359801.

It can be written as a sum of positive squares in 8 ways, for example, as 461734144 + 627803136 = 21488^2 + 25056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089537289) 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, 681442 + ... + 683038.

It is an arithmetic number, because the mean of its divisors is an integer number (20006161).

Almost surely, 2^1089537280 is an apocalyptic number.

1089537280 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 1089537280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440443592).

1089537280 is an abundant number, since it is smaller than the sum of its proper divisors (1791349904).

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

1089537280 is a wasteful number, since it uses less digits than its factorization.

1089537280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1089537280 is about 33008.1396022254. The cubic root of 1089537280 is about 1028.9968175797.

The spelling of 1089537280 in words is "one billion, eighty-nine million, five hundred thirty-seven thousand, two hundred eighty".