22458 has 16 divisors (see below), whose sum is σ = 47520. Its totient is φ = 7056.

The previous prime is 22453. The next prime is 22469. The reversal of 22458 is 85422.

Added to its reverse (85422) it gives a triangular number (107880 = T₄₆₄).

22458 is an undulating number in base 14.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 212.

It is an arithmetic number, because the mean of its divisors is an integer number (2970).

2²²⁴⁵⁸ is an apocalyptic number.

22458 is an abundant number, since it is smaller than the sum of its proper divisors (25062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23760).

22458 is a wasteful number, since it uses less digits than its factorization.

22458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 640, while the sum is 21.

The square root of 22458 is about 149.8599346056. The cubic root of 22458 is about 28.2135039193.

Adding to 22458 its reverse (85422), we get a triangular number (107880 = T₄₆₄).

It can be divided in two parts, 224 and 58, that added together give a palindrome (282).

The spelling of 22458 in words is "twenty-two thousand, four hundred fifty-eight".