1089080720 has 160 divisors (see below), whose sum is σ = 3135632640. Its totient is φ = 342558720.

The previous prime is 1089080711. The next prime is 1089080731. The reversal of 1089080720 is 270809801.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1535726 + ... + 1536434.

It is an arithmetic number, because the mean of its divisors is an integer number (19597704).

Almost surely, 2^1089080720 is an apocalyptic number.

1089080720 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 1089080720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567816320).

1089080720 is an abundant number, since it is smaller than the sum of its proper divisors (2046551920).

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

1089080720 is a wasteful number, since it uses less digits than its factorization.

1089080720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1089080720 is about 33001.2230076402. The cubic root of 1089080720 is about 1028.8530671294.

The spelling of 1089080720 in words is "one billion, eighty-nine million, eighty thousand, seven hundred twenty".