1089870984 has 64 divisors (see below), whose sum is σ = 3030321600. Its totient is φ = 362942208.

The previous prime is 1089870973. The next prime is 1089870997. The reversal of 1089870984 is 4890789801.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1089870984.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327312 + ... + 330624.

It is an arithmetic number, because the mean of its divisors is an integer number (47348775).

Almost surely, 2^1089870984 is an apocalyptic number.

It is an amenable number.

1089870984 is an abundant number, since it is smaller than the sum of its proper divisors (1940450616).

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

1089870984 is a wasteful number, since it uses less digits than its factorization.

1089870984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851 (or 4841 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1089870984 is about 33013.1940896363. The cubic root of 1089870984 is about 1029.1018607356.

The spelling of 1089870984 in words is "one billion, eighty-nine million, eight hundred seventy thousand, nine hundred eighty-four".