22278016 has 16 divisors (see below), whose sum is σ = 44382240. Its totient is φ = 11138944.

The previous prime is 22277989. The next prime is 22278017. The reversal of 22278016 is 61087222.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22278017) by changing a digit.

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 as a sum of consecutive naturals, namely, 86896 + ... + 87151.

It is an arithmetic number, because the mean of its divisors is an integer number (2773890).

Almost surely, 2^22278016 is an apocalyptic number.

It is an amenable number.

22278016 is a deficient number, since it is larger than the sum of its proper divisors (22104224).

22278016 is an equidigital number, since it uses as much as digits as its factorization.

22278016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174061 (or 174049 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22278016 is about 4719.9593218586. The cubic root of 22278016 is about 281.3793165979.

The spelling of 22278016 in words is "twenty-two million, two hundred seventy-eight thousand, sixteen".