1089508405 has 8 divisors (see below), whose sum is σ = 1307840184. Its totient is φ = 871320000.

The previous prime is 1089508397. The next prime is 1089508411. The reversal of 1089508405 is 5048059801.

It can be written as a sum of positive squares in 4 ways, for example, as 65060356 + 1024448049 = 8066^2 + 32007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1089508405 - 2³ = 1089508397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18346 + ... + 50155.

It is an arithmetic number, because the mean of its divisors is an integer number (163480023).

Almost surely, 2^1089508405 is an apocalyptic number.

It is an amenable number.

1089508405 is a deficient number, since it is larger than the sum of its proper divisors (218331779).

1089508405 is an equidigital number, since it uses as much as digits as its factorization.

1089508405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71687.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 1089508405 is about 33007.7022072122. The cubic root of 1089508405 is about 1028.9877273154.

The spelling of 1089508405 in words is "one billion, eighty-nine million, five hundred eight thousand, four hundred five".