2178680808 has 32 divisors (see below), whose sum is σ = 5528000160. Its totient is φ = 715387200.

The previous prime is 2178680789. The next prime is 2178680813. The reversal of 2178680808 is 8080868712.

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, 675843 + ... + 679058.

It is an arithmetic number, because the mean of its divisors is an integer number (172750005).

Almost surely, 2^2178680808 is an apocalyptic number.

It is an amenable number.

2178680808 is an abundant number, since it is smaller than the sum of its proper divisors (3349319352).

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

2178680808 is a wasteful number, since it uses less digits than its factorization.

2178680808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354977 (or 1354973 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The square root of 2178680808 is about 46676.3409876995. The cubic root of 2178680808 is about 1296.3766575916.

The spelling of 2178680808 in words is "two billion, one hundred seventy-eight million, six hundred eighty thousand, eight hundred eight".