1089489280 has 256 divisors, whose sum is σ = 3005164800. Its totient is φ = 374169600.

The previous prime is 1089489263. The next prime is 1089489329. The reversal of 1089489280 is 829849801.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17860450 + ... + 17860510.

It is an arithmetic number, because the mean of its divisors is an integer number (11738925).

Almost surely, 2^1089489280 is an apocalyptic number.

1089489280 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 1089489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502582400).

1089489280 is an abundant number, since it is smaller than the sum of its proper divisors (1915675520).

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

1089489280 is a wasteful number, since it uses less digits than its factorization.

1089489280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 1089489280 is about 33007.4125008308. The cubic root of 1089489280 is about 1028.9817064025.

The spelling of 1089489280 in words is "one billion, eighty-nine million, four hundred eighty-nine thousand, two hundred eighty".