678344444 has 6 divisors (see below), whose sum is σ = 1187102784. Its totient is φ = 339172220.

The previous prime is 678344413. The next prime is 678344453. The reversal of 678344444 is 444443876.

It is a junction number, because it is equal to n+sod(n) for n = 678344395 and 678344404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84793052 + ... + 84793059.

It is an arithmetic number, because the mean of its divisors is an integer number (197850464).

Almost surely, 2^678344444 is an apocalyptic number.

It is an amenable number.

678344444 is a deficient number, since it is larger than the sum of its proper divisors (508758340).

678344444 is a wasteful number, since it uses less digits than its factorization.

678344444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169586115 (or 169586113 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 44.

The square root of 678344444 is about 26045.0464388144. The cubic root of 678344444 is about 878.6517076513.

The spelling of 678344444 in words is "six hundred seventy-eight million, three hundred forty-four thousand, four hundred forty-four".