878638 has 16 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 422136.

The previous prime is 878629. The next prime is 878641. The reversal of 878638 is 836878.

878638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 878638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10545 + ... + 10627.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2⁸⁷⁸⁶³⁸ is an apocalyptic number.

878638 is a deficient number, since it is larger than the sum of its proper divisors (492242).

878638 is a wasteful number, since it uses less digits than its factorization.

878638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231.

The product of its digits is 64512, while the sum is 40.

The square root of 878638 is about 937.3569224154. The cubic root of 878638 is about 95.7789328722.

The spelling of 878638 in words is "eight hundred seventy-eight thousand, six hundred thirty-eight".