305978856 has 32 divisors (see below), whose sum is σ = 765404640. Its totient is φ = 101931968.

The previous prime is 305978851. The next prime is 305978857. The reversal of 305978856 is 658879503.

It is a junction number, because it is equal to n+sod(n) for n = 305978799 and 305978808.

It is not an unprimeable number, because it can be changed into a prime (305978851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56875 + ... + 62021.

It is an arithmetic number, because the mean of its divisors is an integer number (23918895).

Almost surely, 2^305978856 is an apocalyptic number.

It is an amenable number.

305978856 is an abundant number, since it is smaller than the sum of its proper divisors (459425784).

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

305978856 is a wasteful number, since it uses less digits than its factorization.

305978856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633 (or 7629 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 51.

The square root of 305978856 is about 17492.2513130815. The cubic root of 305978856 is about 673.8508887738.

The spelling of 305978856 in words is "three hundred five million, nine hundred seventy-eight thousand, eight hundred fifty-six".