84220812 has 108 divisors (see below), whose sum is σ = 234474240. Its totient is φ = 25474176.

The previous prime is 84220793. The next prime is 84220819. The reversal of 84220812 is 21802248.

It is not an unprimeable number, because it can be changed into a prime (84220819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 663093 + ... + 663219.

Almost surely, 2^84220812 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 84220812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117237120).

84220812 is an abundant number, since it is smaller than the sum of its proper divisors (150253428).

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

84220812 is a wasteful number, since it uses less digits than its factorization.

84220812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 84220812 is about 9177.1897659360. The cubic root of 84220812 is about 438.3353283734.

The spelling of 84220812 in words is "eighty-four million, two hundred twenty thousand, eight hundred twelve".