18112860 has 72 divisors (see below), whose sum is σ = 56137536. Its totient is φ = 4725120.

The previous prime is 18112817. The next prime is 18112879. The reversal of 18112860 is 6821181.

It is a super-4 number, since 4×18112860⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7390 + ... + 9530.

It is an arithmetic number, because the mean of its divisors is an integer number (779688).

Almost surely, 2^18112860 is an apocalyptic number.

18112860 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 18112860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28068768).

18112860 is an abundant number, since it is smaller than the sum of its proper divisors (38024676).

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

18112860 is a wasteful number, since it uses less digits than its factorization.

18112860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2198 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 18112860 is about 4255.9205819658. The cubic root of 18112860 is about 262.6207335772.

It can be divided in two parts, 181 and 12860, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 18112860 in words is "eighteen million, one hundred twelve thousand, eight hundred sixty".