18089000 has 32 divisors (see below), whose sum is σ = 42330600. Its totient is φ = 7235200.

The previous prime is 18088997. The next prime is 18089009. The reversal of 18089000 is 98081.

It can be written as a sum of positive squares in 4 ways, for example, as 9597604 + 8491396 = 3098^2 + 2914^2 .

It is not an unprimeable number, because it can be changed into a prime (18089009) 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, 8045 + ... + 10044.

Almost surely, 2^18089000 is an apocalyptic number.

18089000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18089000 is an abundant number, since it is smaller than the sum of its proper divisors (24241600).

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

18089000 is a wasteful number, since it uses less digits than its factorization.

18089000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18110 (or 18096 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18089000 is about 4253.1165044000. The cubic root of 18089000 is about 262.5053664814.

The spelling of 18089000 in words is "eighteen million, eighty-nine thousand".