878921568 has 72 divisors (see below), whose sum is σ = 2856501648. Its totient is φ = 251119872.

The previous prime is 878921497. The next prime is 878921581. The reversal of 878921568 is 865129878.

878921568 is a `hidden beast` number, since 8 + 78 + 9 + 2 + 1 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 5.

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, 215971 + ... + 220002.

It is an arithmetic number, because the mean of its divisors is an integer number (39673634).

Almost surely, 2^878921568 is an apocalyptic number.

It is an amenable number.

878921568 is an abundant number, since it is smaller than the sum of its proper divisors (1977580080).

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

878921568 is a wasteful number, since it uses less digits than its factorization.

878921568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435996 (or 435985 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 878921568 is about 29646.6114083886. The cubic root of 878921568 is about 957.8923552965.

The spelling of 878921568 in words is "eight hundred seventy-eight million, nine hundred twenty-one thousand, five hundred sixty-eight".