22308138 has 12 divisors (see below), whose sum is σ = 48334338. Its totient is φ = 7436040.

The previous prime is 22308133. The next prime is 22308149. The reversal of 22308138 is 83180322.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 1814409 = 4527^2 + 1347^2 .

It is a super-3 number, since 3×22308138³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22308133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 619653 + ... + 619688.

Almost surely, 2^22308138 is an apocalyptic number.

22308138 is an abundant number, since it is smaller than the sum of its proper divisors (26026200).

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

22308138 is a wasteful number, since it uses less digits than its factorization.

22308138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239349 (or 1239346 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22308138 is about 4723.1491613118. The cubic root of 22308138 is about 281.5060766986.

The spelling of 22308138 in words is "twenty-two million, three hundred eight thousand, one hundred thirty-eight".