28821336255 has 24 divisors (see below), whose sum is σ = 49960993680. Its totient is φ = 15370145280.

The previous prime is 28821336197. The next prime is 28821336293. The reversal of 28821336255 is 55263312882.

28821336255 is a `hidden beast` number, since 2 + 8 + 8 + 2 + 13 + 3 + 625 + 5 = 666.

It is not a de Polignac number, because 28821336255 - 2¹⁸ = 28821074111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28821336255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 937935 + ... + 968175.

It is an arithmetic number, because the mean of its divisors is an integer number (2081708070).

Almost surely, 2^28821336255 is an apocalyptic number.

28821336255 is a deficient number, since it is larger than the sum of its proper divisors (21139657425).

28821336255 is a wasteful number, since it uses less digits than its factorization.

28821336255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51431 (or 51428 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 28821336255 in words is "twenty-eight billion, eight hundred twenty-one million, three hundred thirty-six thousand, two hundred fifty-five".