878478 has 16 divisors (see below), whose sum is σ = 1814016. Its totient is φ = 283320.

The previous prime is 878467. The next prime is 878489. The reversal of 878478 is 874878.

It is an interprime number because it is at equal distance from previous prime (878467) and next prime (878489).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 878478.

It is an unprimeable number.

878478 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, 2176 + ... + 2547.

It is an arithmetic number, because the mean of its divisors is an integer number (113376).

2⁸⁷⁸⁴⁷⁸ is an apocalyptic number.

878478 is an abundant number, since it is smaller than the sum of its proper divisors (935538).

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

878478 is a wasteful number, since it uses less digits than its factorization.

878478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759.

The product of its digits is 100352, while the sum is 42.

The square root of 878478 is about 937.2715721711. The cubic root of 878478 is about 95.7731187373.

Subtracting from 878478 its reverse (874878), we obtain a square (3600 = 60²).

The spelling of 878478 in words is "eight hundred seventy-eight thousand, four hundred seventy-eight".