878534891 has 8 divisors (see below), whose sum is σ = 1001768544. Its totient is φ = 763251840.

The previous prime is 878534861. The next prime is 878534897. The reversal of 878534891 is 198435878.

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

It is not a de Polignac number, because 878534891 - 2⁶ = 878534827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878534897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987415 + ... + 1987856.

It is an arithmetic number, because the mean of its divisors is an integer number (125221068).

Almost surely, 2^878534891 is an apocalyptic number.

878534891 is a deficient number, since it is larger than the sum of its proper divisors (123233653).

878534891 is a wasteful number, since it uses less digits than its factorization.

878534891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975301.

The product of its digits is 1935360, while the sum is 53.

The square root of 878534891 is about 29640.0892542516. The cubic root of 878534891 is about 957.7518614281.

The spelling of 878534891 in words is "eight hundred seventy-eight million, five hundred thirty-four thousand, eight hundred ninety-one".