814135878 has 24 divisors (see below), whose sum is σ = 1785216888. Its totient is φ = 268108512.

The previous prime is 814135801. The next prime is 814135897. The reversal of 814135878 is 878531418.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270975 + ... + 273962.

It is an arithmetic number, because the mean of its divisors is an integer number (74384037).

Almost surely, 2^814135878 is an apocalyptic number.

814135878 is an abundant number, since it is smaller than the sum of its proper divisors (971081010).

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

814135878 is a wasteful number, since it uses less digits than its factorization.

814135878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545028 (or 545025 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 814135878 is about 28533.0663967264. The cubic root of 814135878 is about 933.7536189061.

The spelling of 814135878 in words is "eight hundred fourteen million, one hundred thirty-five thousand, eight hundred seventy-eight".