28288643633 has 4 divisors (see below), whose sum is σ = 28380789360. Its totient is φ = 28196497908.

The previous prime is 28288643609. The next prime is 28288643651. The reversal of 28288643633 is 33634688282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28288643633 - 2¹² = 28288639537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28288643653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46072403 + ... + 46073016.

It is an arithmetic number, because the mean of its divisors is an integer number (7095197340).

Almost surely, 2^28288643633 is an apocalyptic number.

It is an amenable number.

28288643633 is a deficient number, since it is larger than the sum of its proper divisors (92145727).

28288643633 is an equidigital number, since it uses as much as digits as its factorization.

28288643633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92145726.

The product of its digits is 7962624, while the sum is 53.

The spelling of 28288643633 in words is "twenty-eight billion, two hundred eighty-eight million, six hundred forty-three thousand, six hundred thirty-three".