678184142 has 4 divisors (see below), whose sum is σ = 1017276216. Its totient is φ = 339092070.

The previous prime is 678184139. The next prime is 678184151. The reversal of 678184142 is 241481876.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 678184142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169546034 + ... + 169546037.

It is an arithmetic number, because the mean of its divisors is an integer number (254319054).

Almost surely, 2^678184142 is an apocalyptic number.

678184142 is a deficient number, since it is larger than the sum of its proper divisors (339092074).

678184142 is a wasteful number, since it uses less digits than its factorization.

678184142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339092073.

The product of its digits is 86016, while the sum is 41.

The square root of 678184142 is about 26041.9688579800. The cubic root of 678184142 is about 878.5824897568.

The spelling of 678184142 in words is "six hundred seventy-eight million, one hundred eighty-four thousand, one hundred forty-two".