79836 has 12 divisors (see below), whose sum is σ = 186312. Its totient is φ = 26608.

The previous prime is 79829. The next prime is 79841. The reversal of 79836 is 63897.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 79797 and 79806.

It is a congruent number.

It is an unprimeable number.

79836 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, 3315 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (15526).

2⁷⁹⁸³⁶ is an apocalyptic number.

It is an amenable number.

79836 is an abundant number, since it is smaller than the sum of its proper divisors (106476).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93156).

79836 is a wasteful number, since it uses less digits than its factorization.

79836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660 (or 6658 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 79836 is about 282.5526499610. The cubic root of 79836 is about 43.0592297169.

The spelling of 79836 in words is "seventy-nine thousand, eight hundred thirty-six".