84227220 has 288 divisors, whose sum is σ = 327075840. Its totient is φ = 17038080.

The previous prime is 84227179. The next prime is 84227261. The reversal of 84227220 is 2272248.

It is an interprime number because it is at equal distance from previous prime (84227179) and next prime (84227261).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 817689 + ... + 817791.

It is an arithmetic number, because the mean of its divisors is an integer number (1135680).

Almost surely, 2^84227220 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 84227220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163537920).

84227220 is an abundant number, since it is smaller than the sum of its proper divisors (242848620).

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

84227220 is a wasteful number, since it uses less digits than its factorization.

84227220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 84227220 is about 9177.5388857798. The cubic root of 84227220 is about 438.3464451092.

Adding to 84227220 its reverse (2272248), we get a palindrome (86499468).

The spelling of 84227220 in words is "eighty-four million, two hundred twenty-seven thousand, two hundred twenty".