878231820 has 24 divisors (see below), whose sum is σ = 2459049264. Its totient is φ = 234195136.

The previous prime is 878231803. The next prime is 878231821. The reversal of 878231820 is 28132878.

It is a super-2 number, since 2×878231820² = 1542582259321024800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (878231821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7318539 + ... + 7318658.

It is an arithmetic number, because the mean of its divisors is an integer number (102460386).

Almost surely, 2^878231820 is an apocalyptic number.

It is an amenable number.

878231820 is an abundant number, since it is smaller than the sum of its proper divisors (1580817444).

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

878231820 is a wasteful number, since it uses less digits than its factorization.

878231820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14637209 (or 14637207 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 878231820 is about 29634.9762949121. The cubic root of 878231820 is about 957.6417158506.

The spelling of 878231820 in words is "eight hundred seventy-eight million, two hundred thirty-one thousand, eight hundred twenty".