22938381 has 12 divisors (see below), whose sum is σ = 33226908. Its totient is φ = 15249024.

The previous prime is 22938373. The next prime is 22938407. The reversal of 22938381 is 18383922.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 15729156 = 2685^2 + 3966^2 .

It is not a de Polignac number, because 22938381 - 2³ = 22938373 is a prime.

It is a super-2 number, since 2×22938381² = 1052338645802322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22938341) 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 11 ways as a sum of consecutive naturals, for example, 60 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (2768909).

Almost surely, 2^22938381 is an apocalyptic number.

It is an amenable number.

22938381 is a deficient number, since it is larger than the sum of its proper divisors (10288527).

22938381 is a wasteful number, since it uses less digits than its factorization.

22938381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7212 (or 7209 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 22938381 is about 4789.4029899352. The cubic root of 22938381 is about 284.1325052840.

It can be divided in two parts, 22938 and 381, that multiplied together give a palindrome (8739378).

The spelling of 22938381 in words is "twenty-two million, nine hundred thirty-eight thousand, three hundred eighty-one".