84539728 has 80 divisors (see below), whose sum is σ = 208208896. Its totient is φ = 32348160.

The previous prime is 84539723. The next prime is 84539803. The reversal of 84539728 is 82793548.

It is a super-2 number, since 2×84539728² = 14293931220627968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84539723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44200 + ... + 46072.

Almost surely, 2^84539728 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 84539728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104104448).

84539728 is an abundant number, since it is smaller than the sum of its proper divisors (123669168).

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

84539728 is a wasteful number, since it uses less digits than its factorization.

84539728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 1926 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 84539728 is about 9194.5488198171. The cubic root of 84539728 is about 438.8879078283.

It can be divided in two parts, 8453 and 9728, that added together give a palindrome (18181).

The spelling of 84539728 in words is "eighty-four million, five hundred thirty-nine thousand, seven hundred twenty-eight".