28204383947855 has 8 divisors (see below), whose sum is σ = 33845444430864. Its totient is φ = 22563384696000.

The previous prime is 28204383947821. The next prime is 28204383947893. The reversal of 28204383947855 is 55874938340282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28204383947855 - 2¹² = 28204383943759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14288246 + ... + 16141955.

It is an arithmetic number, because the mean of its divisors is an integer number (4230680553858).

Almost surely, 2^{28204383947855} is an apocalyptic number.

28204383947855 is a deficient number, since it is larger than the sum of its proper divisors (5641060483009).

28204383947855 is a wasteful number, since it uses less digits than its factorization.

28204383947855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30615577.

The product of its (nonzero) digits is 464486400, while the sum is 68.

The spelling of 28204383947855 in words is "twenty-eight trillion, two hundred four billion, three hundred eighty-three million, nine hundred forty-seven thousand, eight hundred fifty-five".