86838815 has 16 divisors (see below), whose sum is σ = 122313792. Its totient is φ = 57936384.

The previous prime is 86838803. The next prime is 86838841. The reversal of 86838815 is 51883868.

It is a cyclic number.

It is not a de Polignac number, because 86838815 - 2⁴ = 86838799 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86838815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32234 + ... + 34823.

It is an arithmetic number, because the mean of its divisors is an integer number (7644612).

Almost surely, 2^86838815 is an apocalyptic number.

86838815 is a deficient number, since it is larger than the sum of its proper divisors (35474977).

86838815 is a wasteful number, since it uses less digits than its factorization.

86838815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67106.

The product of its digits is 368640, while the sum is 47.

The square root of 86838815 is about 9318.7346244005. The cubic root of 86838815 is about 442.8309460992.

The spelling of 86838815 in words is "eighty-six million, eight hundred thirty-eight thousand, eight hundred fifteen".