864359986 has 32 divisors (see below), whose sum is σ = 1522759680. Its totient is φ = 360289296.

The previous prime is 864359981. The next prime is 864360001. The reversal of 864359986 is 689953468.

It is a self number, because there is not a number n which added to its sum of digits gives 864359986.

It is not an unprimeable number, because it can be changed into a prime (864359981) 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, 103225 + ... + 111283.

It is an arithmetic number, because the mean of its divisors is an integer number (47586240).

Almost surely, 2^864359986 is an apocalyptic number.

864359986 is a deficient number, since it is larger than the sum of its proper divisors (658399694).

864359986 is a wasteful number, since it uses less digits than its factorization.

864359986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278.

The product of its digits is 11197440, while the sum is 58.

The square root of 864359986 is about 29399.9997619048. Note that the first 3 decimals coincide. The cubic root of 864359986 is about 952.5728910905.

The spelling of 864359986 in words is "eight hundred sixty-four million, three hundred fifty-nine thousand, nine hundred eighty-six".