28343368856 has 16 divisors (see below), whose sum is σ = 57975072840. Its totient is φ = 12883349440.

The previous prime is 28343368843. The next prime is 28343368873. The reversal of 28343368856 is 65886334382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161041781 + ... + 161041956.

Almost surely, 2^28343368856 is an apocalyptic number.

It is an amenable number.

28343368856 is an abundant number, since it is smaller than the sum of its proper divisors (29631703984).

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

28343368856 is a wasteful number, since it uses less digits than its factorization.

28343368856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322083754 (or 322083750 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 56.

The spelling of 28343368856 in words is "twenty-eight billion, three hundred forty-three million, three hundred sixty-eight thousand, eight hundred fifty-six".