86786538 has 16 divisors (see below), whose sum is σ = 173780256. Its totient is φ = 28894320.

The previous prime is 86786537. The next prime is 86786611. The reversal of 86786538 is 83568768.

It is not an unprimeable number, because it can be changed into a prime (86786533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2893 + ... + 13488.

It is an arithmetic number, because the mean of its divisors is an integer number (10861266).

Almost surely, 2^86786538 is an apocalyptic number.

86786538 is an abundant number, since it is smaller than the sum of its proper divisors (86993718).

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

86786538 is a wasteful number, since it uses less digits than its factorization.

86786538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17269.

The product of its digits is 1935360, while the sum is 51.

The square root of 86786538 is about 9315.9292612170. The cubic root of 86786538 is about 442.7420667951.

It can be divided in two parts, 867865 and 38, that added together give a triangular number (867903 = T₁₃₁₇).

The spelling of 86786538 in words is "eighty-six million, seven hundred eighty-six thousand, five hundred thirty-eight".