22388816 has 10 divisors (see below), whose sum is σ = 43378362. Its totient is φ = 11194400.

The previous prime is 22388791. The next prime is 22388827. The reversal of 22388816 is 61888322.

It can be written as a sum of positive squares in only one way, i.e., 22052416 + 336400 = 4696^2 + 580^2 .

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 22388816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699635 + ... + 699666.

Almost surely, 2^22388816 is an apocalyptic number.

It is an amenable number.

22388816 is a deficient number, since it is larger than the sum of its proper divisors (20989546).

22388816 is a wasteful number, since it uses less digits than its factorization.

22388816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399309 (or 1399303 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 22388816 is about 4731.6821533150. The cubic root of 22388816 is about 281.8450265980.

The spelling of 22388816 in words is "twenty-two million, three hundred eighty-eight thousand, eight hundred sixteen".