818612 has 12 divisors (see below), whose sum is σ = 1482180. Its totient is φ = 395136.

The previous prime is 818603. The next prime is 818621. The reversal of 818612 is 216818.

It is an interprime number because it is at equal distance from previous prime (818603) and next prime (818621).

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 119716 = 836^2 + 346^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 818612.

It is an unprimeable number.

818612 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 3 ways as a sum of consecutive naturals, for example, 3413 + ... + 3644.

It is an arithmetic number, because the mean of its divisors is an integer number (123515).

2⁸¹⁸⁶¹² is an apocalyptic number.

It is an amenable number.

818612 is a deficient number, since it is larger than the sum of its proper divisors (663568).

818612 is a wasteful number, since it uses less digits than its factorization.

818612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7090 (or 7088 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 818612 is about 904.7717944322. The cubic root of 818612 is about 93.5461752536.

The spelling of 818612 in words is "eight hundred eighteen thousand, six hundred twelve".