678021996 has 24 divisors (see below), whose sum is σ = 1582714224. Its totient is φ = 225912640.

The previous prime is 678021947. The next prime is 678022013. The reversal of 678021996 is 699120876.

678021996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 21826 + ... + 42806.

It is an arithmetic number, because the mean of its divisors is an integer number (65946426).

Almost surely, 2^678021996 is an apocalyptic number.

It is an amenable number.

678021996 is an abundant number, since it is smaller than the sum of its proper divisors (904692228).

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

678021996 is a wasteful number, since it uses less digits than its factorization.

678021996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23681 (or 23679 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 678021996 is about 26038.8555048028. The cubic root of 678021996 is about 878.5124645319.

The spelling of 678021996 in words is "six hundred seventy-eight million, twenty-one thousand, nine hundred ninety-six".