18289000 has 32 divisors (see below), whose sum is σ = 42798600. Its totient is φ = 7315200.

The previous prime is 18288983. The next prime is 18289003. The reversal of 18289000 is 98281.

It can be written as a sum of positive squares in 4 ways, for example, as 11329956 + 6959044 = 3366^2 + 2638^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18289000.

It is not an unprimeable number, because it can be changed into a prime (18289003) 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, 8145 + ... + 10144.

Almost surely, 2^18289000 is an apocalyptic number.

18289000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18289000 is an abundant number, since it is smaller than the sum of its proper divisors (24509600).

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

18289000 is a wasteful number, since it uses less digits than its factorization.

18289000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18310 (or 18296 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18289000 is about 4276.5640413771. The cubic root of 18289000 is about 263.4692812254.

The spelling of 18289000 in words is "eighteen million, two hundred eighty-nine thousand".