878040 has 80 divisors (see below), whose sum is σ = 2962080. Its totient is φ = 233280.

The previous prime is 878039. The next prime is 878041. The reversal of 878040 is 40878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (878039) and next prime (878041).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 877995 and 878013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3105 + ... + 3375.

It is an arithmetic number, because the mean of its divisors is an integer number (37026).

2⁸⁷⁸⁰⁴⁰ 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 878040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481040).

878040 is an abundant number, since it is smaller than the sum of its proper divisors (2084040).

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

878040 is a wasteful number, since it uses less digits than its factorization.

878040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 878040 is about 937.0378861071. The cubic root of 878040 is about 95.7571989306.

The spelling of 878040 in words is "eight hundred seventy-eight thousand, forty".