867870 has 24 divisors (see below), whose sum is σ = 2256696. Its totient is φ = 231408.

The previous prime is 867857. The next prime is 867871. The reversal of 867870 is 78768.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867871) by changing a digit.

867870 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4732 + ... + 4911.

It is an arithmetic number, because the mean of its divisors is an integer number (94029).

2⁸⁶⁷⁸⁷⁰ is an apocalyptic number.

867870 is an abundant number, since it is smaller than the sum of its proper divisors (1388826).

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

867870 is a wasteful number, since it uses less digits than its factorization.

867870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9656 (or 9653 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 867870 is about 931.5954057422. The cubic root of 867870 is about 95.3860560029.

The spelling of 867870 in words is "eight hundred sixty-seven thousand, eight hundred seventy".