879864 has 32 divisors (see below), whose sum is σ = 2239440. Its totient is φ = 288000.

The previous prime is 879863. The next prime is 879881. The reversal of 879864 is 468978.

879864 = T₄₆₅ + T₄₆₆ + ... + T₄₇₂.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879863) 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, 1164 + ... + 1764.

2⁸⁷⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 879864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119720).

879864 is an abundant number, since it is smaller than the sum of its proper divisors (1359576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

879864 is a wasteful number, since it uses less digits than its factorization.

879864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 667 counting only the distinct ones).

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

The square root of 879864 is about 938.0106609202. The cubic root of 879864 is about 95.8234602725.

It can be divided in two parts, 87986 and 4, that added together give a triangular number (87990 = T₄₁₉).

The spelling of 879864 in words is "eight hundred seventy-nine thousand, eight hundred sixty-four".