878578 has 4 divisors (see below), whose sum is σ = 1317870. Its totient is φ = 439288.

The previous prime is 878573. The next prime is 878593. The reversal of 878578 is 875878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 786769 + 91809 = 887^2 + 303^2 .

It is not an unprimeable number, because it can be changed into a prime (878573) 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 as a sum of consecutive naturals, namely, 219643 + ... + 219646.

2⁸⁷⁸⁵⁷⁸ is an apocalyptic number.

878578 is a deficient number, since it is larger than the sum of its proper divisors (439292).

878578 is a wasteful number, since it uses less digits than its factorization.

878578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439291.

The product of its digits is 125440, while the sum is 43.

The square root of 878578 is about 937.3249169845. The cubic root of 878578 is about 95.7767526543.

The spelling of 878578 in words is "eight hundred seventy-eight thousand, five hundred seventy-eight".