22227820 has 24 divisors (see below), whose sum is σ = 46998000. Its totient is φ = 8830272.

The previous prime is 22227817. The next prime is 22227827. The reversal of 22227820 is 2872222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22227827) 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 in 7 ways as a sum of consecutive naturals, for example, 750 + ... + 6709.

It is an arithmetic number, because the mean of its divisors is an integer number (1958250).

Almost surely, 2^22227820 is an apocalyptic number.

22227820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22227820 is an abundant number, since it is smaller than the sum of its proper divisors (24770180).

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

22227820 is a wasteful number, since it uses less digits than its factorization.

22227820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7617 (or 7615 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 22227820 is about 4714.6389045186. The cubic root of 22227820 is about 281.1678265285.

The spelling of 22227820 in words is "twenty-two million, two hundred twenty-seven thousand, eight hundred twenty".