84720684 has 48 divisors (see below), whose sum is σ = 207986688. Its totient is φ = 26788608.

The previous prime is 84720683. The next prime is 84720697. The reversal of 84720684 is 48602748.

It is not an unprimeable number, because it can be changed into a prime (84720683) 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, 33844 + ... + 36260.

It is an arithmetic number, because the mean of its divisors is an integer number (4333056).

Almost surely, 2^84720684 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 84720684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103993344).

84720684 is an abundant number, since it is smaller than the sum of its proper divisors (123266004).

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

84720684 is a wasteful number, since it uses less digits than its factorization.

84720684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 84720684 is about 9204.3839554856. The cubic root of 84720684 is about 439.2008289605.

The spelling of 84720684 in words is "eighty-four million, seven hundred twenty thousand, six hundred eighty-four".