867980 has 12 divisors (see below), whose sum is σ = 1822800. Its totient is φ = 347184.

The previous prime is 867959. The next prime is 867991. The reversal of 867980 is 89768.

It is an unprimeable number.

867980 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 21680 + ... + 21719.

It is an arithmetic number, because the mean of its divisors is an integer number (151900).

2⁸⁶⁷⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

867980 is an abundant number, since it is smaller than the sum of its proper divisors (954820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

867980 is a wasteful number, since it uses less digits than its factorization.

867980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43408 (or 43406 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 867980 is about 931.6544423766. The cubic root of 867980 is about 95.3900858012.

The spelling of 867980 in words is "eight hundred sixty-seven thousand, nine hundred eighty".