1089562740 has 96 divisors (see below), whose sum is σ = 3496953600. Its totient is φ = 248303616.

The previous prime is 1089562723. The next prime is 1089562757. The reversal of 1089562740 is 472659801.

It is an interprime number because it is at equal distance from previous prime (1089562723) and next prime (1089562757).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1089562692 and 1089562701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144586 + ... + 151934.

It is an arithmetic number, because the mean of its divisors is an integer number (36426600).

Almost surely, 2^1089562740 is an apocalyptic number.

1089562740 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 1089562740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748476800).

1089562740 is an abundant number, since it is smaller than the sum of its proper divisors (2407390860).

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

1089562740 is a wasteful number, since it uses less digits than its factorization.

1089562740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7721 (or 7719 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1089562740 is about 33008.5252624227. The cubic root of 1089562740 is about 1029.0048326198.

The spelling of 1089562740 in words is "one billion, eighty-nine million, five hundred sixty-two thousand, seven hundred forty".