86543784 has 96 divisors (see below), whose sum is σ = 252907200. Its totient is φ = 26645760.

The previous prime is 86543783. The next prime is 86543813. The reversal of 86543784 is 48734568.

It is not an unprimeable number, because it can be changed into a prime (86543783) 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 23 ways as a sum of consecutive naturals, for example, 55317 + ... + 56859.

It is an arithmetic number, because the mean of its divisors is an integer number (2634450).

Almost surely, 2^86543784 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 86543784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126453600).

86543784 is an abundant number, since it is smaller than the sum of its proper divisors (166363416).

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

86543784 is a wasteful number, since it uses less digits than its factorization.

86543784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1608 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 86543784 is about 9302.8911635040. The cubic root of 86543784 is about 442.3288776227.

The spelling of 86543784 in words is "eighty-six million, five hundred forty-three thousand, seven hundred eighty-four".