28204383947856 has 80 divisors (see below), whose sum is σ = 73967083839360. Its totient is φ = 9259067883520.

The previous prime is 28204383947821. The next prime is 28204383947893. The reversal of 28204383947856 is 65874938340282.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1288185 + ... + 7620248.

It is an arithmetic number, because the mean of its divisors is an integer number (924588547992).

Almost surely, 2^{28204383947856} is an apocalyptic number.

It is an amenable number.

28204383947856 is an abundant number, since it is smaller than the sum of its proper divisors (45762699891504).

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

28204383947856 is a wasteful number, since it uses less digits than its factorization.

28204383947856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8909444 (or 8909438 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 69.

The spelling of 28204383947856 in words is "twenty-eight trillion, two hundred four billion, three hundred eighty-three million, nine hundred forty-seven thousand, eight hundred fifty-six".