818964 has 24 divisors (see below), whose sum is σ = 2123520. Its totient is φ = 272952.

The previous prime is 818963. The next prime is 818969. The reversal of 818964 is 469818.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818963) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3684 + ... + 3899.

It is an arithmetic number, because the mean of its divisors is an integer number (88480).

2⁸¹⁸⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

818964 is an abundant number, since it is smaller than the sum of its proper divisors (1304556).

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

818964 is a wasteful number, since it uses less digits than its factorization.

818964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7596 (or 7588 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 818964 is about 904.9662977150. The cubic root of 818964 is about 93.5595814970.

It can be divided in two parts, 81 and 8964, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 818964 in words is "eight hundred eighteen thousand, nine hundred sixty-four".