22278030 has 64 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 5599616.

The previous prime is 22278029. The next prime is 22278037. The reversal of 22278030 is 3087222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22278037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57076 + ... + 57464.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^22278030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22278030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28304640).

22278030 is an abundant number, since it is smaller than the sum of its proper divisors (34331250).

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

22278030 is a wasteful number, since it uses less digits than its factorization.

22278030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 22278030 is about 4719.9608049220. The cubic root of 22278030 is about 281.3793755396.

The spelling of 22278030 in words is "twenty-two million, two hundred seventy-eight thousand, thirty".