678246434 has 16 divisors (see below), whose sum is σ = 1037043000. Its totient is φ = 332597760.

The previous prime is 678246419. The next prime is 678246449. The reversal of 678246434 is 434642876.

It is an interprime number because it is at equal distance from previous prime (678246419) and next prime (678246449).

It can be written as a sum of positive squares in 4 ways, for example, as 161366209 + 516880225 = 12703^2 + 22735^2 .

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, 35192 + ... + 50940.

Almost surely, 2^678246434 is an apocalyptic number.

678246434 is a deficient number, since it is larger than the sum of its proper divisors (358796566).

678246434 is a wasteful number, since it uses less digits than its factorization.

678246434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16165.

The product of its digits is 774144, while the sum is 44.

The square root of 678246434 is about 26043.1648230395. The cubic root of 678246434 is about 878.6093885402.

The spelling of 678246434 in words is "six hundred seventy-eight million, two hundred forty-six thousand, four hundred thirty-four".