678038578 has 12 divisors (see below), whose sum is σ = 1183108302. Its totient is φ = 290587920.

The previous prime is 678038567. The next prime is 678038587. The reversal of 678038578 is 875830876.

It can be written as a sum of positive squares in only one way, i.e., 677717089 + 321489 = 26033^2 + 567^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3459283 + ... + 3459478.

Almost surely, 2^678038578 is an apocalyptic number.

678038578 is a deficient number, since it is larger than the sum of its proper divisors (505069724).

678038578 is a wasteful number, since it uses less digits than its factorization.

678038578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6918777 (or 6918770 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 678038578 is about 26039.1739116278. The cubic root of 678038578 is about 878.5196262341.

The spelling of 678038578 in words is "six hundred seventy-eight million, thirty-eight thousand, five hundred seventy-eight".