28338721633 has 8 divisors (see below), whose sum is σ = 28893283200. Its totient is φ = 27784896048.

The previous prime is 28338721573. The next prime is 28338721639. The reversal of 28338721633 is 33612783382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28338721633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28338721639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105913 + ... + 260566.

It is an arithmetic number, because the mean of its divisors is an integer number (3611660400).

Almost surely, 2^28338721633 is an apocalyptic number.

It is an amenable number.

28338721633 is a deficient number, since it is larger than the sum of its proper divisors (554561567).

28338721633 is a wasteful number, since it uses less digits than its factorization.

28338721633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367991.

The product of its digits is 870912, while the sum is 46.

The spelling of 28338721633 in words is "twenty-eight billion, three hundred thirty-eight million, seven hundred twenty-one thousand, six hundred thirty-three".