84547220 has 48 divisors (see below), whose sum is σ = 185436048. Its totient is φ = 32348160.

The previous prime is 84547217. The next prime is 84547231. The reversal of 84547220 is 2274548.

It can be written as a sum of positive squares in 8 ways, for example, as 16418704 + 68128516 = 4052^2 + 8254^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44204 + ... + 46076.

It is an arithmetic number, because the mean of its divisors is an integer number (3863251).

Almost surely, 2^84547220 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 84547220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92718024).

84547220 is an abundant number, since it is smaller than the sum of its proper divisors (100888828).

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

84547220 is a wasteful number, since it uses less digits than its factorization.

84547220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 84547220 is about 9194.9562261057. The cubic root of 84547220 is about 438.9008723487.

The spelling of 84547220 in words is "eighty-four million, five hundred forty-seven thousand, two hundred twenty".