878761 has 8 divisors (see below), whose sum is σ = 987840. Its totient is φ = 775632.

The previous prime is 878749. The next prime is 878777. The reversal of 878761 is 167878.

It is a happy number.

878761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-878761 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

878761 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 878761.

It is not an unprimeable number, because it can be changed into a prime (872761) 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, 1171 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (123480).

2⁸⁷⁸⁷⁶¹ is an apocalyptic number.

It is an amenable number.

878761 is a deficient number, since it is larger than the sum of its proper divisors (109079).

878761 is a wasteful number, since it uses less digits than its factorization.

878761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975.

The product of its digits is 18816, while the sum is 37.

The square root of 878761 is about 937.4225301325. The cubic root of 878761 is about 95.7834020085.

The spelling of 878761 in words is "eight hundred seventy-eight thousand, seven hundred sixty-one".