28338407663 has 4 divisors (see below), whose sum is σ = 29570512368. Its totient is φ = 27106302960.

The previous prime is 28338407627. The next prime is 28338407683. The reversal of 28338407663 is 36670483382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28338407663 - 2²⁶ = 28271298799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338407623) 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 3 ways as a sum of consecutive naturals, for example, 616052318 + ... + 616052363.

It is an arithmetic number, because the mean of its divisors is an integer number (7392628092).

Almost surely, 2^28338407663 is an apocalyptic number.

28338407663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28338407663 is a deficient number, since it is larger than the sum of its proper divisors (1232104705).

28338407663 is a wasteful number, since it uses less digits than its factorization.

28338407663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232104704.

The product of its (nonzero) digits is 3483648, while the sum is 50.

The spelling of 28338407663 in words is "twenty-eight billion, three hundred thirty-eight million, four hundred seven thousand, six hundred sixty-three".