22738 has 4 divisors (see below), whose sum is σ = 34110. Its totient is φ = 11368.

The previous prime is 22727. The next prime is 22739. The reversal of 22738 is 83722.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18769 + 3969 = 137^2 + 63^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹² + 2¹⁴ + 7 + 3⁷ + 8² .

It is a plaindrome in base 12.

It is a nialpdrome in base 8.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (22739) 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 as a sum of consecutive naturals, namely, 5683 + ... + 5686.

2²²⁷³⁸ is an apocalyptic number.

22738 is a deficient number, since it is larger than the sum of its proper divisors (11372).

22738 is a wasteful number, since it uses less digits than its factorization.

22738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11371.

The product of its digits is 672, while the sum is 22.

The square root of 22738 is about 150.7912464303. The cubic root of 22738 is about 28.3302726413.

It can be divided in two parts, 2 and 2738, that multiplied together give a square (5476 = 74²).

The spelling of 22738 in words is "twenty-two thousand, seven hundred thirty-eight".