867878 has 16 divisors (see below), whose sum is σ = 1437696. Its totient is φ = 389640.

The previous prime is 867871. The next prime is 867887. The reversal of 867878 is 878768.

It is a happy number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867871) 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 7 ways as a sum of consecutive naturals, for example, 2075 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (89856).

2⁸⁶⁷⁸⁷⁸ is an apocalyptic number.

867878 is a deficient number, since it is larger than the sum of its proper divisors (569818).

867878 is a wasteful number, since it uses less digits than its factorization.

867878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499.

The product of its digits is 150528, while the sum is 44.

The square root of 867878 is about 931.5996994418. The cubic root of 867878 is about 95.3863490907.

The spelling of 867878 in words is "eight hundred sixty-seven thousand, eight hundred seventy-eight".