190818 has 12 divisors (see below), whose sum is σ = 413478. Its totient is φ = 63600.

The previous prime is 190811. The next prime is 190823. The reversal of 190818 is 818091.

190818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 59049 = 363^2 + 243^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 190791 and 190800.

It is not an unprimeable number, because it can be changed into a prime (190811) by changing a digit.

190818 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, 5283 + ... + 5318.

2¹⁹⁰⁸¹⁸ is an apocalyptic number.

190818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

190818 is an abundant number, since it is smaller than the sum of its proper divisors (222660).

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

190818 is a wasteful number, since it uses less digits than its factorization.

190818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10609 (or 10606 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 190818 is about 436.8271969555. The cubic root of 190818 is about 57.5713543906.

The spelling of 190818 in words is "one hundred ninety thousand, eight hundred eighteen".