878458646 has 32 divisors (see below), whose sum is σ = 1512211680. Its totient is φ = 379132416.

The previous prime is 878458643. The next prime is 878458649. The reversal of 878458646 is 646854878.

878458646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (878458643) and next prime (878458649).

It is a junction number, because it is equal to n+sod(n) for n = 878458591 and 878458600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878458643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63065 + ... + 75723.

It is an arithmetic number, because the mean of its divisors is an integer number (47256615).

Almost surely, 2^878458646 is an apocalyptic number.

878458646 is a deficient number, since it is larger than the sum of its proper divisors (633753034).

878458646 is a wasteful number, since it uses less digits than its factorization.

878458646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12848.

The product of its digits is 10321920, while the sum is 56.

The square root of 878458646 is about 29638.8030460071. The cubic root of 878458646 is about 957.7241539711.

The spelling of 878458646 in words is "eight hundred seventy-eight million, four hundred fifty-eight thousand, six hundred forty-six".