22016778 has 24 divisors (see below), whose sum is σ = 51223392. Its totient is φ = 6290424.

The previous prime is 22016767. The next prime is 22016809. The reversal of 22016778 is 87761022.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37150 + ... + 37737.

It is an arithmetic number, because the mean of its divisors is an integer number (2134308).

Almost surely, 2^22016778 is an apocalyptic number.

22016778 is an abundant number, since it is smaller than the sum of its proper divisors (29206614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22016778 is a wasteful number, since it uses less digits than its factorization.

22016778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74906 (or 74899 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 22016778 is about 4692.2039597613. The cubic root of 22016778 is about 280.2751462016.

The spelling of 22016778 in words is "twenty-two million, sixteen thousand, seven hundred seventy-eight".