678306920 has 32 divisors (see below), whose sum is σ = 1527525000. Its totient is φ = 271085568.

The previous prime is 678306907. The next prime is 678306943. The reversal of 678306920 is 29603876.

It can be written as a sum of positive squares in 4 ways, for example, as 648517156 + 29789764 = 25466^2 + 5458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43172 + ... + 56748.

Almost surely, 2^678306920 is an apocalyptic number.

It is an amenable number.

678306920 is an abundant number, since it is smaller than the sum of its proper divisors (849218080).

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

678306920 is a wasteful number, since it uses less digits than its factorization.

678306920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14837 (or 14833 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 678306920 is about 26044.3260615436. The cubic root of 678306920 is about 878.6355058849.

The spelling of 678306920 in words is "six hundred seventy-eight million, three hundred six thousand, nine hundred twenty".