878647 has 8 divisors (see below), whose sum is σ = 1095552. Its totient is φ = 684600.

The previous prime is 878641. The next prime is 878651. The reversal of 878647 is 746878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 878647 - 2¹⁵ = 845879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878641) 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, 5629 + ... + 5782.

It is an arithmetic number, because the mean of its divisors is an integer number (136944).

2⁸⁷⁸⁶⁴⁷ is an apocalyptic number.

878647 is a deficient number, since it is larger than the sum of its proper divisors (216905).

878647 is a wasteful number, since it uses less digits than its factorization.

878647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11429.

The product of its digits is 75264, while the sum is 40.

The square root of 878647 is about 937.3617231357. The cubic root of 878647 is about 95.7792598963.

Subtracting from 878647 its reverse (746878), we obtain a square (131769 = 363²).

The spelling of 878647 in words is "eight hundred seventy-eight thousand, six hundred forty-seven".