878112417 has 128 divisors (see below), whose sum is σ = 1614807040. Its totient is φ = 411505920.

The previous prime is 878112409. The next prime is 878112419. The reversal of 878112417 is 714211878.

It is not a de Polignac number, because 878112417 - 2³ = 878112409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (878112419) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6914208 + ... + 6914334.

It is an arithmetic number, because the mean of its divisors is an integer number (12615680).

Almost surely, 2^878112417 is an apocalyptic number.

It is an amenable number.

878112417 is a deficient number, since it is larger than the sum of its proper divisors (736694623).

878112417 is a wasteful number, since it uses less digits than its factorization.

878112417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its digits is 25088, while the sum is 39.

The square root of 878112417 is about 29632.9616643359. The cubic root of 878112417 is about 957.5983140692.

The spelling of 878112417 in words is "eight hundred seventy-eight million, one hundred twelve thousand, four hundred seventeen".