878678457 has 4 divisors (see below), whose sum is σ = 1171571280. Its totient is φ = 585785636.

The previous prime is 878678393. The next prime is 878678497. The reversal of 878678457 is 754876878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 878678457 - 2⁶ = 878678393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 878678457.

It is not an unprimeable number, because it can be changed into a prime (878678497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146446407 + ... + 146446412.

It is an arithmetic number, because the mean of its divisors is an integer number (292892820).

Almost surely, 2^878678457 is an apocalyptic number.

It is an amenable number.

878678457 is a deficient number, since it is larger than the sum of its proper divisors (292892823).

878678457 is a wasteful number, since it uses less digits than its factorization.

878678457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292892822.

The product of its digits is 21073920, while the sum is 60.

The square root of 878678457 is about 29642.5109766362. The cubic root of 878678457 is about 957.8040290070.

The spelling of 878678457 in words is "eight hundred seventy-eight million, six hundred seventy-eight thousand, four hundred fifty-seven".