878423890 has 16 divisors (see below), whose sum is σ = 1614805632. Its totient is φ = 343893424.

The previous prime is 878423879. The next prime is 878423899. The reversal of 878423890 is 98324878.

878423890 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (878423899) 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 7 ways as a sum of consecutive naturals, for example, 934024 + ... + 934963.

It is an arithmetic number, because the mean of its divisors is an integer number (100925352).

Almost surely, 2^878423890 is an apocalyptic number.

878423890 is a deficient number, since it is larger than the sum of its proper divisors (736381742).

878423890 is a wasteful number, since it uses less digits than its factorization.

878423890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869041.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 878423890 is about 29638.2167142357. The cubic root of 878423890 is about 957.7115230977.

The spelling of 878423890 in words is "eight hundred seventy-eight million, four hundred twenty-three thousand, eight hundred ninety".