86681986 has 32 divisors (see below), whose sum is σ = 141523200. Its totient is φ = 39695040.

The previous prime is 86681981. The next prime is 86681989. The reversal of 86681986 is 68918668.

It is not an unprimeable number, because it can be changed into a prime (86681981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241275 + ... + 241633.

It is an arithmetic number, because the mean of its divisors is an integer number (4422600).

Almost surely, 2^86681986 is an apocalyptic number.

86681986 is a deficient number, since it is larger than the sum of its proper divisors (54841214).

86681986 is a wasteful number, since it uses less digits than its factorization.

86681986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its digits is 995328, while the sum is 52.

The square root of 86681986 is about 9310.3161063414. The cubic root of 86681986 is about 442.5642044581.

The spelling of 86681986 in words is "eighty-six million, six hundred eighty-one thousand, nine hundred eighty-six".