1089285985 has 8 divisors (see below), whose sum is σ = 1317436416. Its totient is φ = 864566640.

The previous prime is 1089285983. The next prime is 1089286007. The reversal of 1089285985 is 5895829801.

It is a happy number.

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

It is not a de Polignac number, because 1089285985 - 2¹ = 1089285983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089285983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857071 + ... + 858340.

It is an arithmetic number, because the mean of its divisors is an integer number (164679552).

Almost surely, 2^1089285985 is an apocalyptic number.

It is an amenable number.

1089285985 is a deficient number, since it is larger than the sum of its proper divisors (228150431).

1089285985 is a wasteful number, since it uses less digits than its factorization.

1089285985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715543.

The product of its (nonzero) digits is 2073600, while the sum is 55.

The square root of 1089285985 is about 33004.3328216160. The cubic root of 1089285985 is about 1028.9177009239.

The spelling of 1089285985 in words is "one billion, eighty-nine million, two hundred eighty-five thousand, nine hundred eighty-five".