22266778 has 16 divisors (see below), whose sum is σ = 33888960. Its totient is φ = 10971936.

The previous prime is 22266757. The next prime is 22266781. The reversal of 22266778 is 87766222.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22266778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54238 + ... + 54646.

It is an arithmetic number, because the mean of its divisors is an integer number (2118060).

Almost surely, 2^22266778 is an apocalyptic number.

22266778 is a deficient number, since it is larger than the sum of its proper divisors (11622182).

22266778 is a wasteful number, since it uses less digits than its factorization.

22266778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741.

The product of its digits is 112896, while the sum is 40.

The square root of 22266778 is about 4718.7686953272. The cubic root of 22266778 is about 281.3319953192.

The spelling of 22266778 in words is "twenty-two million, two hundred sixty-six thousand, seven hundred seventy-eight".