678838238 has 32 divisors (see below), whose sum is σ = 1161409536. Its totient is φ = 295197408.

The previous prime is 678838229. The next prime is 678838253. The reversal of 678838238 is 832838876.

It is a self number, because there is not a number n which added to its sum of digits gives 678838238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31595 + ... + 48537.

It is an arithmetic number, because the mean of its divisors is an integer number (36294048).

Almost surely, 2^678838238 is an apocalyptic number.

678838238 is a deficient number, since it is larger than the sum of its proper divisors (482571298).

678838238 is a wasteful number, since it uses less digits than its factorization.

678838238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048.

The product of its digits is 3096576, while the sum is 53.

The square root of 678838238 is about 26054.5243287994. The cubic root of 678838238 is about 878.8648578239.

The spelling of 678838238 in words is "six hundred seventy-eight million, eight hundred thirty-eight thousand, two hundred thirty-eight".