86868686 has 32 divisors (see below), whose sum is σ = 137494368. Its totient is φ = 41126400.

The previous prime is 86868679. The next prime is 86868689. The reversal of 86868686 is 68686868.

86868686 is an undulating number in base 10.

86868686 is a modest number, since divided by 868686 gives 86 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86868689) 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 15 ways as a sum of consecutive naturals, for example, 634010 + ... + 634146.

It is an arithmetic number, because the mean of its divisors is an integer number (4296699).

Almost surely, 2^86868686 is an apocalyptic number.

86868686 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

86868686 is a deficient number, since it is larger than the sum of its proper divisors (50625682).

86868686 is a wasteful number, since it uses less digits than its factorization.

86868686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356.

The product of its digits is 5308416, while the sum is 56.

The square root of 86868686 is about 9320.3372256587. The cubic root of 86868686 is about 442.8817155881.

The spelling of 86868686 in words is "eighty-six million, eight hundred sixty-eight thousand, six hundred eighty-six".