18087080 has 96 divisors (see below), whose sum is σ = 46395720. Its totient is φ = 6336000.

The previous prime is 18087079. The next prime is 18087101. The reversal of 18087080 is 8078081.

It can be written as a sum of positive squares in 4 ways, for example, as 18028516 + 58564 = 4246^2 + 242^2 .

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 in 23 ways as a sum of consecutive naturals, for example, 179030 + ... + 179130.

Almost surely, 2^18087080 is an apocalyptic number.

18087080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18087080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23197860).

18087080 is an abundant number, since it is smaller than the sum of its proper divisors (28308640).

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

18087080 is a wasteful number, since it uses less digits than its factorization.

18087080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 18087080 is about 4252.8907815743. The cubic root of 18087080 is about 262.4960785506.

It can be divided in two parts, 1808 and 7080, that added together give a palindrome (8888).

The spelling of 18087080 in words is "eighteen million, eighty-seven thousand, eighty".