28338663 has 4 divisors (see below), whose sum is σ = 37784888. Its totient is φ = 18892440.

The previous prime is 28338659. The next prime is 28338683. The reversal of 28338663 is 36683382.

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

It is not a de Polignac number, because 28338663 - 2² = 28338659 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 (28338613) 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, 4723108 + ... + 4723113.

It is an arithmetic number, because the mean of its divisors is an integer number (9446222).

Almost surely, 2^28338663 is an apocalyptic number.

28338663 is a deficient number, since it is larger than the sum of its proper divisors (9446225).

28338663 is an equidigital number, since it uses as much as digits as its factorization.

28338663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446224.

The product of its digits is 124416, while the sum is 39.

The square root of 28338663 is about 5323.4070856924. The cubic root of 28338663 is about 304.8782565266.

The spelling of 28338663 in words is "twenty-eight million, three hundred thirty-eight thousand, six hundred sixty-three".