185418 has 12 divisors (see below), whose sum is σ = 401778. Its totient is φ = 61800.

The previous prime is 185401. The next prime is 185429. The reversal of 185418 is 814581.

It can be written as a sum of positive squares in only one way, i.e., 110889 + 74529 = 333^2 + 273^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 185391 and 185400.

It is an unprimeable number.

185418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5133 + ... + 5168.

2¹⁸⁵⁴¹⁸ is an apocalyptic number.

185418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

185418 is an abundant number, since it is smaller than the sum of its proper divisors (216360).

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

185418 is a wasteful number, since it uses less digits than its factorization.

185418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10309 (or 10306 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 185418 is about 430.6019043153. The cubic root of 185418 is about 57.0230746835.

Adding to 185418 its reverse (814581), we get a palindrome (999999).

The spelling of 185418 in words is "one hundred eighty-five thousand, four hundred eighteen".