1089044840 has 32 divisors (see below), whose sum is σ = 2638840680. Its totient is φ = 402108672.

The previous prime is 1089044839. The next prime is 1089044843. The reversal of 1089044840 is 484409801.

It can be written as a sum of positive squares in 4 ways, for example, as 877225924 + 211818916 = 29618^2 + 14554^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1089044794 and 1089044803.

It is not an unprimeable number, because it can be changed into a prime (1089044843) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1046639 + ... + 1047678.

Almost surely, 2^1089044840 is an apocalyptic number.

1089044840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089044840 is an abundant number, since it is smaller than the sum of its proper divisors (1549795840).

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

1089044840 is a wasteful number, since it uses less digits than its factorization.

1089044840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094341 (or 2094337 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 1089044840 is about 33000.6793869460. The cubic root of 1089044840 is about 1028.8417684097.

The spelling of 1089044840 in words is "one billion, eighty-nine million, forty-four thousand, eight hundred forty".