863142878 has 32 divisors (see below), whose sum is σ = 1417120320. Its totient is φ = 391910400.

The previous prime is 863142877. The next prime is 863142883. The reversal of 863142878 is 878241368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863142871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426926 + ... + 428942.

It is an arithmetic number, because the mean of its divisors is an integer number (44285010).

Almost surely, 2^863142878 is an apocalyptic number.

863142878 is a deficient number, since it is larger than the sum of its proper divisors (553977442).

863142878 is a wasteful number, since it uses less digits than its factorization.

863142878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its digits is 516096, while the sum is 47.

The square root of 863142878 is about 29379.2933543338. The cubic root of 863142878 is about 952.1255741128.

The spelling of 863142878 in words is "eight hundred sixty-three million, one hundred forty-two thousand, eight hundred seventy-eight".