678238856 has 32 divisors (see below), whose sum is σ = 1297994880. Its totient is φ = 332164800.

The previous prime is 678238843. The next prime is 678238859. The reversal of 678238856 is 658832876.

It is a junction number, because it is equal to n+sod(n) for n = 678238798 and 678238807.

It is not an unprimeable number, because it can be changed into a prime (678238859) 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, 93521 + ... + 100511.

It is an arithmetic number, because the mean of its divisors is an integer number (40562340).

Almost surely, 2^678238856 is an apocalyptic number.

It is an amenable number.

678238856 is a deficient number, since it is larger than the sum of its proper divisors (619756024).

678238856 is a wasteful number, since it uses less digits than its factorization.

678238856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7245 (or 7241 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The square root of 678238856 is about 26043.0193334030. The cubic root of 678238856 is about 878.6061163142.

The spelling of 678238856 in words is "six hundred seventy-eight million, two hundred thirty-eight thousand, eight hundred fifty-six".