18112458 has 64 divisors (see below), whose sum is σ = 45561600. Its totient is φ = 4769856.

The previous prime is 18112441. The next prime is 18112459. The reversal of 18112458 is 85421181.

It is a happy number.

It is a super-2 number, since 2×18112458² = 656122269603528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18112459) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 26416 + ... + 27092.

It is an arithmetic number, because the mean of its divisors is an integer number (711900).

Almost surely, 2^18112458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18112458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22780800).

18112458 is an abundant number, since it is smaller than the sum of its proper divisors (27449142).

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

18112458 is a wasteful number, since it uses less digits than its factorization.

18112458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 702 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 18112458 is about 4255.8733533788. The cubic root of 18112458 is about 262.6187906793.

The spelling of 18112458 in words is "eighteen million, one hundred twelve thousand, four hundred fifty-eight".