22786 has 4 divisors (see below), whose sum is σ = 34182. Its totient is φ = 11392.

The previous prime is 22783. The next prime is 22787. The reversal of 22786 is 68722.

22786 is nontrivially palindromic in base 5.

22786 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68722 = 2 ⋅34361.

It can be written as a sum of positive squares in only one way, i.e., 17161 + 5625 = 131^2 + 75^2 .

It is an Ulam number.

22786 is an undulating number in base 5.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 22786.

It is not an unprimeable number, because it can be changed into a prime (22783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695 + ... + 5698.

2²²⁷⁸⁶ is an apocalyptic number.

22786 is a deficient number, since it is larger than the sum of its proper divisors (11396).

22786 is a wasteful number, since it uses less digits than its factorization.

22786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395.

The product of its digits is 1344, while the sum is 25.

The square root of 22786 is about 150.9503229543. The cubic root of 22786 is about 28.3501937326.

It can be divided in two parts, 227 and 86, that added together give a palindrome (313).

The spelling of 22786 in words is "twenty-two thousand, seven hundred eighty-six".