813836 has 6 divisors (see below), whose sum is σ = 1424220. Its totient is φ = 406916.

The previous prime is 813833. The next prime is 813847. The reversal of 813836 is 638318.

It is a junction number, because it is equal to n+sod(n) for n = 813799 and 813808.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813836.

It is not an unprimeable number, because it can be changed into a prime (813833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101726 + ... + 101733.

It is an arithmetic number, because the mean of its divisors is an integer number (237370).

2⁸¹³⁸³⁶ is an apocalyptic number.

It is an amenable number.

813836 is a deficient number, since it is larger than the sum of its proper divisors (610384).

813836 is a wasteful number, since it uses less digits than its factorization.

813836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203463 (or 203461 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 813836 is about 902.1285939377. The cubic root of 813836 is about 93.3638958867.

The spelling of 813836 in words is "eight hundred thirteen thousand, eight hundred thirty-six".