918818 has 8 divisors (see below), whose sum is σ = 1382940. Its totient is φ = 457840.

The previous prime is 918793. The next prime is 918823. The reversal of 918818 is 818819.

It can be written as a sum of positive squares in 2 ways, for example, as 908209 + 10609 = 953^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

918818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188 + ... + 1368.

2⁹¹⁸⁸¹⁸ is an apocalyptic number.

918818 is a deficient number, since it is larger than the sum of its proper divisors (464122).

918818 is a wasteful number, since it uses less digits than its factorization.

918818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 4608, while the sum is 35.

The square root of 918818 is about 958.5499465338. The cubic root of 918818 is about 97.2172125975.

Subtracting from 918818 its reverse (818819), we obtain a palindrome (99999).

The spelling of 918818 in words is "nine hundred eighteen thousand, eight hundred eighteen".