1081089180 has 120 divisors (see below), whose sum is σ = 3416526960. Its totient is φ = 286156800.

The previous prime is 1081089161. The next prime is 1081089197. The reversal of 1081089180 is 819801801.

It is a super-2 number, since 2×1081089180² = 2337507630226144800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 222780 + ... + 227580.

It is an arithmetic number, because the mean of its divisors is an integer number (28471058).

Almost surely, 2^1081089180 is an apocalyptic number.

1081089180 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 1081089180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1708263480).

1081089180 is an abundant number, since it is smaller than the sum of its proper divisors (2335437780).

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

1081089180 is a wasteful number, since it uses less digits than its factorization.

1081089180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961 (or 4950 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 1081089180 is about 32879.9206203421. The cubic root of 1081089180 is about 1026.3303542748.

The spelling of 1081089180 in words is "one billion, eighty-one million, eighty-nine thousand, one hundred eighty".