86128765 has 8 divisors (see below), whose sum is σ = 103567968. Its totient is φ = 68760720.

The previous prime is 86128697. The next prime is 86128781. The reversal of 86128765 is 56782168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86128765 - 2⁹ = 86128253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15087 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (12945996).

Almost surely, 2^86128765 is an apocalyptic number.

It is an amenable number.

86128765 is a deficient number, since it is larger than the sum of its proper divisors (17439203).

86128765 is a wasteful number, since it uses less digits than its factorization.

86128765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35579.

The product of its digits is 161280, while the sum is 43.

The square root of 86128765 is about 9280.5584422490. The cubic root of 86128765 is about 441.6206845844.

The spelling of 86128765 in words is "eighty-six million, one hundred twenty-eight thousand, seven hundred sixty-five".