678628180 has 12 divisors (see below), whose sum is σ = 1425119220. Its totient is φ = 271451264.

The previous prime is 678628147. The next prime is 678628241. The reversal of 678628180 is 81826876.

It can be written as a sum of positive squares in 2 ways, for example, as 540283536 + 138344644 = 23244^2 + 11762^2 .

It is a super-2 number, since 2×678628180² = 921072413380224800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678628180.

It is a congruent number.

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, 16965685 + ... + 16965724.

It is an arithmetic number, because the mean of its divisors is an integer number (118759935).

Almost surely, 2^678628180 is an apocalyptic number.

It is an amenable number.

678628180 is an abundant number, since it is smaller than the sum of its proper divisors (746491040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678628180 is a wasteful number, since it uses less digits than its factorization.

678628180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33931418 (or 33931416 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 678628180 is about 26050.4928936095. The cubic root of 678628180 is about 878.7741972270.

The spelling of 678628180 in words is "six hundred seventy-eight million, six hundred twenty-eight thousand, one hundred eighty".