22138208 has 24 divisors (see below), whose sum is σ = 43704360. Its totient is φ = 11038720.

The previous prime is 22138189. The next prime is 22138219. The reversal of 22138208 is 80283122.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15008 + ... + 16416.

It is an arithmetic number, because the mean of its divisors is an integer number (1821015).

Almost surely, 2^22138208 is an apocalyptic number.

It is an amenable number.

22138208 is a deficient number, since it is larger than the sum of its proper divisors (21566152).

22138208 is a wasteful number, since it uses less digits than its factorization.

22138208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 22138208 is about 4705.1257156425. The cubic root of 22138208 is about 280.7894726345.

The spelling of 22138208 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred eight".