1089981360 has 480 divisors, whose sum is σ = 4322223360. Its totient is φ = 253062144.

The previous prime is 1089981353. The next prime is 1089981377. The reversal of 1089981360 is 631899801.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4801567 + ... + 4801793.

It is an arithmetic number, because the mean of its divisors is an integer number (9004632).

Almost surely, 2^1089981360 is an apocalyptic number.

1089981360 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 1089981360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2161111680).

1089981360 is an abundant number, since it is smaller than the sum of its proper divisors (3232242000).

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

1089981360 is a wasteful number, since it uses less digits than its factorization.

1089981360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1089981360 is about 33014.8657425712. The cubic root of 1089981360 is about 1029.1366001113.

The spelling of 1089981360 in words is "one billion, eighty-nine million, nine hundred eighty-one thousand, three hundred sixty".