878705556 has 24 divisors (see below), whose sum is σ = 2065967904. Its totient is φ = 290665440.

The previous prime is 878705543. The next prime is 878705557. The reversal of 878705556 is 655507878.

It is a junction number, because it is equal to n+sod(n) for n = 878705499 and 878705508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878705557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277915 + ... + 281058.

It is an arithmetic number, because the mean of its divisors is an integer number (86081996).

Almost surely, 2^878705556 is an apocalyptic number.

It is an amenable number.

878705556 is an abundant number, since it is smaller than the sum of its proper divisors (1187262348).

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

878705556 is a wasteful number, since it uses less digits than its factorization.

878705556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559111 (or 559109 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 51.

The square root of 878705556 is about 29642.9680700162. The cubic root of 878705556 is about 957.8138753333.

The spelling of 878705556 in words is "eight hundred seventy-eight million, seven hundred five thousand, five hundred fifty-six".