878658 has 16 divisors (see below), whose sum is σ = 1917216. Its totient is φ = 266240.

The previous prime is 878651. The next prime is 878659. The reversal of 878658 is 856878.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (878651) by changing a digit.

878658 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 7 ways as a sum of consecutive naturals, for example, 6591 + ... + 6722.

It is an arithmetic number, because the mean of its divisors is an integer number (119826).

2⁸⁷⁸⁶⁵⁸ is an apocalyptic number.

878658 is an abundant number, since it is smaller than the sum of its proper divisors (1038558).

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

878658 is a wasteful number, since it uses less digits than its factorization.

878658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13329.

The product of its digits is 107520, while the sum is 42.

The square root of 878658 is about 937.3675906495. The cubic root of 878658 is about 95.7796595894.

The spelling of 878658 in words is "eight hundred seventy-eight thousand, six hundred fifty-eight".