810742878 has 64 divisors (see below), whose sum is σ = 1985840640. Its totient is φ = 243129600.

The previous prime is 810742873. The next prime is 810742909. The reversal of 810742878 is 878247018.

810742878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810742871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50583 + ... + 64653.

It is an arithmetic number, because the mean of its divisors is an integer number (31028760).

Almost surely, 2^810742878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810742878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992920320).

810742878 is an abundant number, since it is smaller than the sum of its proper divisors (1175097762).

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

810742878 is a wasteful number, since it uses less digits than its factorization.

810742878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14190 (or 14184 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 810742878 is about 28473.5469866330. The cubic root of 810742878 is about 932.4546393612.

The spelling of 810742878 in words is "eight hundred ten million, seven hundred forty-two thousand, eight hundred seventy-eight".