22078 has 16 divisors (see below), whose sum is σ = 40320. Its totient is φ = 8856.

The previous prime is 22073. The next prime is 22079. The reversal of 22078 is 87022.

22078 is nontrivially palindromic in base 11.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22073) by changing a digit.

22078 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225 + ... + 307.

It is an arithmetic number, because the mean of its divisors is an integer number (2520).

2²²⁰⁷⁸ is an apocalyptic number.

22078 is a deficient number, since it is larger than the sum of its proper divisors (18242).

22078 is a wasteful number, since it uses less digits than its factorization.

22078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 22078 is about 148.5866750419. The cubic root of 22078 is about 28.0534692578.

It can be divided in two parts, 2 and 2078, that added together give a triangular number (2080 = T₆₄).

The spelling of 22078 in words is "twenty-two thousand, seventy-eight".