27222820 has 48 divisors (see below), whose sum is σ = 61084800. Its totient is φ = 10160640.

The previous prime is 27222809. The next prime is 27222821. The reversal of 27222820 is 2822272.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27222821) 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 15 ways as a sum of consecutive naturals, for example, 26476 + ... + 27484.

It is an arithmetic number, because the mean of its divisors is an integer number (1272600).

Almost surely, 2^27222820 is an apocalyptic number.

27222820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27222820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30542400).

27222820 is an abundant number, since it is smaller than the sum of its proper divisors (33861980).

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

27222820 is a wasteful number, since it uses less digits than its factorization.

27222820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1106 counting only the distinct ones).

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

The square root of 27222820 is about 5217.5492331170. The cubic root of 27222820 is about 300.8229994344.

The spelling of 27222820 in words is "twenty-seven million, two hundred twenty-two thousand, eight hundred twenty".