8220836 has 18 divisors (see below), whose sum is σ = 15579522. Its totient is φ = 3793920.

The previous prime is 8220803. The next prime is 8220851. The reversal of 8220836 is 6380228.

It can be written as a sum of positive squares in 3 ways, for example, as 155236 + 8065600 = 394^2 + 2840^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8220799 and 8220808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5405 + ... + 6756.

It is an arithmetic number, because the mean of its divisors is an integer number (865529).

Almost surely, 2^8220836 is an apocalyptic number.

It is an amenable number.

8220836 is a deficient number, since it is larger than the sum of its proper divisors (7358686).

8220836 is a wasteful number, since it uses less digits than its factorization.

8220836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191 (or 12176 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8220836 is about 2867.2000279018. The cubic root of 8220836 is about 201.8236214848.

The spelling of 8220836 in words is "eight million, two hundred twenty thousand, eight hundred thirty-six".