8509878 has 48 divisors (see below), whose sum is σ = 20363616. Its totient is φ = 2551680.

The previous prime is 8509873. The next prime is 8509883. The reversal of 8509878 is 8789058.

8509878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8509873) and next prime (8509883).

It is an Ulam number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8509873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9151 + ... + 10037.

It is an arithmetic number, because the mean of its divisors is an integer number (424242).

Almost surely, 2^8509878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8509878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10181808).

8509878 is an abundant number, since it is smaller than the sum of its proper divisors (11853738).

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

8509878 is a wasteful number, since it uses less digits than its factorization.

8509878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 8509878 is about 2917.1695185573. The cubic root of 8509878 is about 204.1617805485.

The spelling of 8509878 in words is "eight million, five hundred nine thousand, eight hundred seventy-eight".