22406 has 8 divisors (see below), whose sum is σ = 35640. Its totient is φ = 10528.

The previous prime is 22397. The next prime is 22409. The reversal of 22406 is 60422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296 + ... + 363.

It is an arithmetic number, because the mean of its divisors is an integer number (4455).

2²²⁴⁰⁶ is an apocalyptic number.

22406 is a deficient number, since it is larger than the sum of its proper divisors (13234).

22406 is a wasteful number, since it uses less digits than its factorization.

22406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22406 is about 149.6863387220. The cubic root of 22406 is about 28.1917115960.

Adding to 22406 its reverse (60422), we get a palindrome (82828).

The spelling of 22406 in words is "twenty-two thousand, four hundred six".