878642 has 8 divisors (see below), whose sum is σ = 1363500. Its totient is φ = 424144.

The previous prime is 878641. The next prime is 878651. The reversal of 878642 is 246878.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 11881 = 931^2 + 109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (878641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7517 + ... + 7632.

2⁸⁷⁸⁶⁴² is an apocalyptic number.

878642 is a deficient number, since it is larger than the sum of its proper divisors (484858).

878642 is a wasteful number, since it uses less digits than its factorization.

878642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15180.

The product of its digits is 21504, while the sum is 35.

The square root of 878642 is about 937.3590560719. The cubic root of 878642 is about 95.7790782165.

The spelling of 878642 in words is "eight hundred seventy-eight thousand, six hundred forty-two".