678703434 has 16 divisors (see below), whose sum is σ = 1377667488. Its totient is φ = 222857712.

The previous prime is 678703391. The next prime is 678703447. The reversal of 678703434 is 434307876.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843757 + ... + 844560.

It is an arithmetic number, because the mean of its divisors is an integer number (86104218).

Almost surely, 2^678703434 is an apocalyptic number.

678703434 is an abundant number, since it is smaller than the sum of its proper divisors (698964054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678703434 is a wasteful number, since it uses less digits than its factorization.

678703434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688389.

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 678703434 is about 26051.9372408272. The cubic root of 678703434 is about 878.8066788476.

The spelling of 678703434 in words is "six hundred seventy-eight million, seven hundred three thousand, four hundred thirty-four".