818918 has 8 divisors (see below), whose sum is σ = 1234200. Its totient is φ = 407520.

The previous prime is 818897. The next prime is 818947. The reversal of 818918 is 819818.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 368 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (154275).

2⁸¹⁸⁹¹⁸ is an apocalyptic number.

818918 is a deficient number, since it is larger than the sum of its proper divisors (415282).

818918 is a wasteful number, since it uses less digits than its factorization.

818918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942.

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

The square root of 818918 is about 904.9408820470. The cubic root of 818918 is about 93.5578297630.

Subtracting 818918 from its reverse (819818), we obtain a square (900 = 30²).

The spelling of 818918 in words is "eight hundred eighteen thousand, nine hundred eighteen".