1089650880 has 280 divisors, whose sum is σ = 3914528112. Its totient is φ = 288893952.

The previous prime is 1089650839. The next prime is 1089650897. The reversal of 1089650880 is 880569801.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6298474 + ... + 6298646.

Almost surely, 2^1089650880 is an apocalyptic number.

1089650880 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 1089650880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957264056).

1089650880 is an abundant number, since it is smaller than the sum of its proper divisors (2824877232).

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

1089650880 is an frugal number, since it uses more digits than its factorization.

1089650880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1089650880 is about 33009.8603450545. The cubic root of 1089650880 is about 1029.0325789309.

It can be divided in two parts, 10896 and 50880, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 1089650880 in words is "one billion, eighty-nine million, six hundred fifty thousand, eight hundred eighty".