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22438 = 213863
BaseRepresentation
bin101011110100110
31010210001
411132212
51204223
6251514
7122263
oct53646
933701
1022438
1115949
1210b9a
13a2a0
14826a
1569ad
hex57a6

22438 has 8 divisors (see below), whose sum is σ = 36288. Its totient is φ = 10344.

The previous prime is 22433. The next prime is 22441. The reversal of 22438 is 83422.

It is a happy number.

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

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22433) 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, 406 + ... + 457.

It is an arithmetic number, because the mean of its divisors is an integer number (4536).

222438 is an apocalyptic number.

22438 is a deficient number, since it is larger than the sum of its proper divisors (13850).

22438 is a wasteful number, since it uses less digits than its factorization.

22438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its digits is 384, while the sum is 19.

The square root of 22438 is about 149.7931907665. The cubic root of 22438 is about 28.2051262414.

Adding to 22438 its product of digits (384), we get a palindrome (22822).

It can be divided in two parts, 224 and 38, that added together give a palindrome (262).

The spelling of 22438 in words is "twenty-two thousand, four hundred thirty-eight".

Divisors: 1 2 13 26 863 1726 11219 22438