678728875 has 16 divisors (see below), whose sum is σ = 924060384. Its totient is φ = 493620000.

The previous prime is 678728867. The next prime is 678728881. The reversal of 678728875 is 578827876.

It is a happy number.

It is not a de Polignac number, because 678728875 - 2³ = 678728867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245436 + ... + 248185.

It is an arithmetic number, because the mean of its divisors is an integer number (57753774).

Almost surely, 2^678728875 is an apocalyptic number.

678728875 is a deficient number, since it is larger than the sum of its proper divisors (245331509).

678728875 is a wasteful number, since it uses less digits than its factorization.

678728875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493647 (or 493637 counting only the distinct ones).

The product of its digits is 10536960, while the sum is 58.

The square root of 678728875 is about 26052.4255108809. The cubic root of 678728875 is about 878.8176593143.

Subtracting from 678728875 its reverse (578827876), we obtain a palindrome (99900999).

The spelling of 678728875 in words is "six hundred seventy-eight million, seven hundred twenty-eight thousand, eight hundred seventy-five".