678242672 has 20 divisors (see below), whose sum is σ = 1314841440. Its totient is φ = 338928768.

The previous prime is 678242647. The next prime is 678242683. The reversal of 678242672 is 276242876.

It is a happy number.

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 in 3 ways as a sum of consecutive naturals, for example, 19529 + ... + 41687.

It is an arithmetic number, because the mean of its divisors is an integer number (65742072).

Almost surely, 2^678242672 is an apocalyptic number.

It is an amenable number.

678242672 is a deficient number, since it is larger than the sum of its proper divisors (636598768).

678242672 is a wasteful number, since it uses less digits than its factorization.

678242672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24080 (or 24074 counting only the distinct ones).

The product of its digits is 451584, while the sum is 44.

The square root of 678242672 is about 26043.0925966944. The cubic root of 678242672 is about 878.6077640890.

The spelling of 678242672 in words is "six hundred seventy-eight million, two hundred forty-two thousand, six hundred seventy-two".