28844947856 has 40 divisors (see below), whose sum is σ = 56677812120. Its totient is φ = 14218592256.

The previous prime is 28844947819. The next prime is 28844947877. The reversal of 28844947856 is 65874944882.

It can be written as a sum of positive squares in 4 ways, for example, as 18198010000 + 10646937856 = 134900^2 + 103184^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28844947792 and 28844947801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3697496 + ... + 3705288.

It is an arithmetic number, because the mean of its divisors is an integer number (1416945303).

Almost surely, 2^28844947856 is an apocalyptic number.

It is an amenable number.

28844947856 is a deficient number, since it is larger than the sum of its proper divisors (27832864264).

28844947856 is a wasteful number, since it uses less digits than its factorization.

28844947856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043 (or 11037 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 65.

The spelling of 28844947856 in words is "twenty-eight billion, eight hundred forty-four million, nine hundred forty-seven thousand, eight hundred fifty-six".