18085688 has 32 divisors (see below), whose sum is σ = 36430560. Its totient is φ = 8386560.

The previous prime is 18085687. The next prime is 18085699. The reversal of 18085688 is 88658081.

It is a super-2 number, since 2×18085688² = 654184220866688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085687) 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, 8720 + ... + 10592.

It is an arithmetic number, because the mean of its divisors is an integer number (1138455).

Almost surely, 2^18085688 is an apocalyptic number.

It is an amenable number.

18085688 is an abundant number, since it is smaller than the sum of its proper divisors (18344872).

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

18085688 is a wasteful number, since it uses less digits than its factorization.

18085688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967 (or 1963 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 44.

The square root of 18085688 is about 4252.7271250340. The cubic root of 18085688 is about 262.4893443898.

The spelling of 18085688 in words is "eighteen million, eighty-five thousand, six hundred eighty-eight".