1089589418 has 4 divisors (see below), whose sum is σ = 1634384130. Its totient is φ = 544794708.

The previous prime is 1089589399. The next prime is 1089589463. The reversal of 1089589418 is 8149859801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 569156449 + 520432969 = 23857^2 + 22813^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1089589418.

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 as a sum of consecutive naturals, namely, 272397353 + ... + 272397356.

Almost surely, 2^1089589418 is an apocalyptic number.

1089589418 is a deficient number, since it is larger than the sum of its proper divisors (544794712).

1089589418 is an equidigital number, since it uses as much as digits as its factorization.

1089589418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544794711.

The product of its (nonzero) digits is 829440, while the sum is 53.

The square root of 1089589418 is about 33008.9293676726. The cubic root of 1089589418 is about 1029.0132309634.

The spelling of 1089589418 in words is "one billion, eighty-nine million, five hundred eighty-nine thousand, four hundred eighteen".