28345945456 has 20 divisors (see below), whose sum is σ = 55199058552. Its totient is φ = 14101027136.

The previous prime is 28345945417. The next prime is 28345945517. The reversal of 28345945456 is 65454954382.

It is a junction number, because it is equal to n+sod(n) for n = 28345945397 and 28345945406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4493350 + ... + 4499653.

Almost surely, 2^28345945456 is an apocalyptic number.

It is an amenable number.

28345945456 is a deficient number, since it is larger than the sum of its proper divisors (26853113096).

28345945456 is a wasteful number, since it uses less digits than its factorization.

28345945456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8993208 (or 8993202 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 55.

The spelling of 28345945456 in words is "twenty-eight billion, three hundred forty-five million, nine hundred forty-five thousand, four hundred fifty-six".