867986 has 24 divisors (see below), whose sum is σ = 1606716. Its totient is φ = 349440.

The previous prime is 867959. The next prime is 867991. The reversal of 867986 is 689768.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 1225 = 931^2 + 35^2 .

It is a super-4 number, since 4×867986⁴ (a number of 25 digits) contains 4444 as substring.

It is a plaindrome in base 15.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1406 + ... + 1926.

2⁸⁶⁷⁹⁸⁶ is an apocalyptic number.

867986 is a deficient number, since it is larger than the sum of its proper divisors (738730).

867986 is a wasteful number, since it uses less digits than its factorization.

867986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 547 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 867986 is about 931.6576624490. The cubic root of 867986 is about 95.3903055985.

The spelling of 867986 in words is "eight hundred sixty-seven thousand, nine hundred eighty-six".