22678 has 16 divisors (see below), whose sum is σ = 38880. Its totient is φ = 9856.

The previous prime is 22669. The next prime is 22679. The reversal of 22678 is 87622.

It is a plaindrome in base 10, base 12 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (2430).

2²²⁶⁷⁸ is an apocalyptic number.

22678 is a deficient number, since it is larger than the sum of its proper divisors (16202).

22678 is a wasteful number, since it uses less digits than its factorization.

22678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71.

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

The square root of 22678 is about 150.5921644708. The cubic root of 22678 is about 28.3053318126.

It can be divided in two parts, 2 and 2678, that multiplied together give a triangular number (5356 = T₁₀₃).

The spelling of 22678 in words is "twenty-two thousand, six hundred seventy-eight".