678847244 has 6 divisors (see below), whose sum is σ = 1187982684. Its totient is φ = 339423620.

The previous prime is 678847189. The next prime is 678847249. The reversal of 678847244 is 442748876.

It is a junction number, because it is equal to n+sod(n) for n = 678847192 and 678847201.

It is not an unprimeable number, because it can be changed into a prime (678847249) by changing a digit.

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 as a sum of consecutive naturals, namely, 84855902 + ... + 84855909.

It is an arithmetic number, because the mean of its divisors is an integer number (197997114).

Almost surely, 2^678847244 is an apocalyptic number.

It is an amenable number.

678847244 is a deficient number, since it is larger than the sum of its proper divisors (509135440).

678847244 is a wasteful number, since it uses less digits than its factorization.

678847244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169711815 (or 169711813 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 50.

The square root of 678847244 is about 26054.6971580942. The cubic root of 678847244 is about 878.8687443767.

The spelling of 678847244 in words is "six hundred seventy-eight million, eight hundred forty-seven thousand, two hundred forty-four".