678780418 has 8 divisors (see below), whose sum is σ = 1018321020. Its totient is φ = 339340080.

The previous prime is 678780383. The next prime is 678780457. The reversal of 678780418 is 814087876.

It can be written as a sum of positive squares in 2 ways, for example, as 678758809 + 21609 = 26053^2 + 147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 4893 + ... + 37168.

Almost surely, 2^678780418 is an apocalyptic number.

678780418 is a deficient number, since it is larger than the sum of its proper divisors (339540602).

678780418 is a wasteful number, since it uses less digits than its factorization.

678780418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50132.

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 678780418 is about 26053.4147090166. The cubic root of 678780418 is about 878.8399046976.

The spelling of 678780418 in words is "six hundred seventy-eight million, seven hundred eighty thousand, four hundred eighteen".