22778210 has 32 divisors (see below), whose sum is σ = 50464512. Its totient is φ = 7208640.

The previous prime is 22778209. The next prime is 22778213. The reversal of 22778210 is 1287722.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22778213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11606 + ... + 13425.

It is an arithmetic number, because the mean of its divisors is an integer number (1577016).

Almost surely, 2^22778210 is an apocalyptic number.

22778210 is an abundant number, since it is smaller than the sum of its proper divisors (27686302).

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

22778210 is a wasteful number, since it uses less digits than its factorization.

22778210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25058.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 22778210 is about 4772.6523024415. The cubic root of 22778210 is about 283.4696260852.

The spelling of 22778210 in words is "twenty-two million, seven hundred seventy-eight thousand, two hundred ten".