678242198 has 32 divisors (see below), whose sum is σ = 1067182560. Its totient is φ = 322882560.

The previous prime is 678242179. The next prime is 678242207. The reversal of 678242198 is 891242876.

It is a happy number.

678242198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent 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, 1921190 + ... + 1921542.

It is an arithmetic number, because the mean of its divisors is an integer number (33349455).

Almost surely, 2^678242198 is an apocalyptic number.

678242198 is a deficient number, since it is larger than the sum of its proper divisors (388940362).

678242198 is a wasteful number, since it uses less digits than its factorization.

678242198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its digits is 387072, while the sum is 47.

The square root of 678242198 is about 26043.0834963911. The cubic root of 678242198 is about 878.6075594129.

The spelling of 678242198 in words is "six hundred seventy-eight million, two hundred forty-two thousand, one hundred ninety-eight".