868133878 has 4 divisors (see below), whose sum is σ = 1302200820. Its totient is φ = 434066938.

The previous prime is 868133869. The next prime is 868133899. The reversal of 868133878 is 878331868.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217033468 + ... + 217033471.

It is an arithmetic number, because the mean of its divisors is an integer number (325550205).

Almost surely, 2^868133878 is an apocalyptic number.

868133878 is a deficient number, since it is larger than the sum of its proper divisors (434066942).

868133878 is a wasteful number, since it uses less digits than its factorization.

868133878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434066941.

The product of its digits is 1548288, while the sum is 52.

The square root of 868133878 is about 29464.1116954168. Note that the first 3 decimals coincide. The cubic root of 868133878 is about 953.9572247799.

The spelling of 868133878 in words is "eight hundred sixty-eight million, one hundred thirty-three thousand, eight hundred seventy-eight".