878649 has 8 divisors (see below), whose sum is σ = 1182720. Its totient is φ = 580176.

The previous prime is 878641. The next prime is 878651. The reversal of 878649 is 946878.

It is a happy number.

878649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 878649 - 2³ = 878641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 878649.

It is not an unprimeable number, because it can be changed into a prime (878641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (147840).

2⁸⁷⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

878649 is a deficient number, since it is larger than the sum of its proper divisors (304071).

878649 is a wasteful number, since it uses less digits than its factorization.

878649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799.

The product of its digits is 96768, while the sum is 42.

The square root of 878649 is about 937.3627899591. The cubic root of 878649 is about 95.7793325680.

The spelling of 878649 in words is "eight hundred seventy-eight thousand, six hundred forty-nine".