84504420 has 432 divisors, whose sum is σ = 355537728. Its totient is φ = 15966720.

The previous prime is 84504397. The next prime is 84504439. The reversal of 84504420 is 2440548.

It is a congruent number.

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 1261227 + ... + 1261293.

It is an arithmetic number, because the mean of its divisors is an integer number (823004).

Almost surely, 2^84504420 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 84504420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177768864).

84504420 is an abundant number, since it is smaller than the sum of its proper divisors (271033308).

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

84504420 is a wasteful number, since it uses less digits than its factorization.

84504420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 84504420 is about 9192.6285685869. The cubic root of 84504420 is about 438.8267988387.

Adding to 84504420 its reverse (2440548), we get a palindrome (86944968).

The spelling of 84504420 in words is "eighty-four million, five hundred four thousand, four hundred twenty".