28776280533 has 32 divisors (see below), whose sum is σ = 51515584512. Its totient is φ = 13798814400.

The previous prime is 28776280531. The next prime is 28776280537. The reversal of 28776280533 is 33508267782.

It is a happy number.

It is not a de Polignac number, because 28776280533 - 2¹ = 28776280531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776280531) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4788253 + ... + 4794258.

It is an arithmetic number, because the mean of its divisors is an integer number (1609862016).

Almost surely, 2^28776280533 is an apocalyptic number.

It is an amenable number.

28776280533 is a deficient number, since it is larger than the sum of its proper divisors (22739303979).

28776280533 is a wasteful number, since it uses less digits than its factorization.

28776280533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582545.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 28776280533 in words is "twenty-eight billion, seven hundred seventy-six million, two hundred eighty thousand, five hundred thirty-three".