818992 has 20 divisors (see below), whose sum is σ = 1680696. Its totient is φ = 385280.

The previous prime is 818977. The next prime is 818999. The reversal of 818992 is 299818.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (818999) by changing a digit.

818992 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234 + ... + 1777.

2⁸¹⁸⁹⁹² is an apocalyptic number.

It is an amenable number.

818992 is an abundant number, since it is smaller than the sum of its proper divisors (861704).

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

818992 is a wasteful number, since it uses less digits than its factorization.

818992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 3030 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 818992 is about 904.9817677721. The cubic root of 818992 is about 93.5606477378.

It can be divided in two parts, 8189 and 92, that added together give a square (8281 = 91²).

The spelling of 818992 in words is "eight hundred eighteen thousand, nine hundred ninety-two".