870878 has 4 divisors (see below), whose sum is σ = 1306320. Its totient is φ = 435438.

The previous prime is 870871. The next prime is 870889. The reversal of 870878 is 878078.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217718 + ... + 217721.

It is an arithmetic number, because the mean of its divisors is an integer number (326580).

2⁸⁷⁰⁸⁷⁸ is an apocalyptic number.

870878 is a deficient number, since it is larger than the sum of its proper divisors (435442).

870878 is a wasteful number, since it uses less digits than its factorization.

870878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435441.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 870878 is about 933.2084440252. The cubic root of 870878 is about 95.4961302490.

It can be divided in two parts, 87087 and 8, that multiplied together give a palindrome (696696).

The spelling of 870878 in words is "eight hundred seventy thousand, eight hundred seventy-eight".