878445 has 28 divisors (see below), whose sum is σ = 1587036. Its totient is φ = 466560.

The previous prime is 878443. The next prime is 878453. The reversal of 878445 is 544878.

878445 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 492804 + 385641 = 702^2 + 621^2 .

It is not a de Polignac number, because 878445 - 2¹ = 878443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3525 + ... + 3765.

2⁸⁷⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

878445 is a deficient number, since it is larger than the sum of its proper divisors (708591).

878445 is an equidigital number, since it uses as much as digits as its factorization.

878445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 249 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 878445 is about 937.2539677163. The cubic root of 878445 is about 95.7719194841.

The spelling of 878445 in words is "eight hundred seventy-eight thousand, four hundred forty-five".