86728811 has 4 divisors (see below), whose sum is σ = 93400272. Its totient is φ = 80057352.

The previous prime is 86728727. The next prime is 86728819. The reversal of 86728811 is 11882768.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86728811 - 2²⁶ = 19619947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86728819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3335711 + ... + 3335736.

It is an arithmetic number, because the mean of its divisors is an integer number (23350068).

Almost surely, 2^86728811 is an apocalyptic number.

86728811 is a deficient number, since it is larger than the sum of its proper divisors (6671461).

86728811 is a wasteful number, since it uses less digits than its factorization.

86728811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671460.

The product of its digits is 43008, while the sum is 41.

The square root of 86728811 is about 9312.8304505129. The cubic root of 86728811 is about 442.6438801380.

The spelling of 86728811 in words is "eighty-six million, seven hundred twenty-eight thousand, eight hundred eleven".