86021718 has 16 divisors (see below), whose sum is σ = 172477296. Its totient is φ = 28601600.

The previous prime is 86021711. The next prime is 86021729. The reversal of 86021718 is 81712068.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86021711) 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 7 ways as a sum of consecutive naturals, for example, 15471 + ... + 20282.

It is an arithmetic number, because the mean of its divisors is an integer number (10779831).

Almost surely, 2^86021718 is an apocalyptic number.

86021718 is an abundant number, since it is smaller than the sum of its proper divisors (86455578).

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

86021718 is a wasteful number, since it uses less digits than its factorization.

86021718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36159.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 86021718 is about 9274.7893776624. The cubic root of 86021718 is about 441.4376494579.

It can be divided in two parts, 860 and 21718, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 86021718 in words is "eighty-six million, twenty-one thousand, seven hundred eighteen".