678456734 has 8 divisors (see below), whose sum is σ = 1018113408. Its totient is φ = 339085600.

The previous prime is 678456721. The next prime is 678456841. The reversal of 678456734 is 437654876.

678456734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65342 + ... + 75009.

It is an arithmetic number, because the mean of its divisors is an integer number (127264176).

Almost surely, 2^678456734 is an apocalyptic number.

678456734 is a deficient number, since it is larger than the sum of its proper divisors (339656674).

678456734 is a wasteful number, since it uses less digits than its factorization.

678456734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142770.

The product of its digits is 3386880, while the sum is 50.

The square root of 678456734 is about 26047.2020378389. The cubic root of 678456734 is about 878.7001876222.

The spelling of 678456734 in words is "six hundred seventy-eight million, four hundred fifty-six thousand, seven hundred thirty-four".