1089981588 has 96 divisors (see below), whose sum is σ = 2932675200. Its totient is φ = 312754176.

The previous prime is 1089981491. The next prime is 1089981601. The reversal of 1089981588 is 8851899801.

1089981588 = 2602² + 2603² + ... + 2753².

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 107556 + ... + 117252.

It is an arithmetic number, because the mean of its divisors is an integer number (30548700).

Almost surely, 2^1089981588 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089981588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1466337600).

1089981588 is an abundant number, since it is smaller than the sum of its proper divisors (1842693612).

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

1089981588 is a wasteful number, since it uses less digits than its factorization.

1089981588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9769 (or 9767 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 57.

The square root of 1089981588 is about 33014.8691955610. The cubic root of 1089981588 is about 1029.1366718688.

The spelling of 1089981588 in words is "one billion, eighty-nine million, nine hundred eighty-one thousand, five hundred eighty-eight".