22294428 has 48 divisors (see below), whose sum is σ = 56349216. Its totient is φ = 6819840.

The previous prime is 22294399. The next prime is 22294439. The reversal of 22294428 is 82449222.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 37300 + ... + 37892.

It is an arithmetic number, because the mean of its divisors is an integer number (1173942).

Almost surely, 2^22294428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22294428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28174608).

22294428 is an abundant number, since it is smaller than the sum of its proper divisors (34054788).

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

22294428 is a wasteful number, since it uses less digits than its factorization.

22294428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 852 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 22294428 is about 4721.6975760843. The cubic root of 22294428 is about 281.4483961156.

It can be divided in two parts, 22294 and 428, that added together give a palindrome (22722).

The spelling of 22294428 in words is "twenty-two million, two hundred ninety-four thousand, four hundred twenty-eight".