878819845 has 8 divisors (see below), whose sum is σ = 1116618264. Its totient is φ = 661699584.

The previous prime is 878819839. The next prime is 878819861. The reversal of 878819845 is 548918878.

It can be written as a sum of positive squares in 4 ways, for example, as 432723204 + 446096641 = 20802^2 + 21121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 878819845 - 2⁵ = 878819813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 878819845.

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 7 ways as a sum of consecutive naturals, for example, 5169444 + ... + 5169613.

It is an arithmetic number, because the mean of its divisors is an integer number (139577283).

Almost surely, 2^878819845 is an apocalyptic number.

878819845 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

878819845 is a deficient number, since it is larger than the sum of its proper divisors (237798419).

878819845 is a wasteful number, since it uses less digits than its factorization.

878819845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10339079.

The product of its digits is 5160960, while the sum is 58.

The square root of 878819845 is about 29644.8957663878. The cubic root of 878819845 is about 957.8553996125.

The spelling of 878819845 in words is "eight hundred seventy-eight million, eight hundred nineteen thousand, eight hundred forty-five".