878986 has 4 divisors (see below), whose sum is σ = 1318482. Its totient is φ = 439492.

The previous prime is 878957. The next prime is 878987. The reversal of 878986 is 689878.

878986 = T₇₆₄ + T₇₆₅ + T₇₆₆.

878986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 874225 + 4761 = 935^2 + 69^2 .

It is not an unprimeable number, because it can be changed into a prime (878987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219745 + ... + 219748.

2⁸⁷⁸⁹⁸⁶ is an apocalyptic number.

878986 is the 766-th centered triangular number.

878986 is a deficient number, since it is larger than the sum of its proper divisors (439496).

878986 is a wasteful number, since it uses less digits than its factorization.

878986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439495.

The product of its digits is 193536, while the sum is 46.

The square root of 878986 is about 937.5425323685. The cubic root of 878986 is about 95.7915761789.

The spelling of 878986 in words is "eight hundred seventy-eight thousand, nine hundred eighty-six".