28163663 has 8 divisors (see below), whose sum is σ = 30862080. Its totient is φ = 25488280.

The previous prime is 28163657. The next prime is 28163671. The reversal of 28163663 is 36636182.

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

It is a cyclic number.

It is not a de Polignac number, because 28163663 - 2²² = 23969359 is a prime.

It is a super-3 number, since 3×28163663³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163633) 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, 3143 + ... + 8136.

It is an arithmetic number, because the mean of its divisors is an integer number (3857760).

Almost surely, 2^28163663 is an apocalyptic number.

28163663 is a deficient number, since it is larger than the sum of its proper divisors (2698417).

28163663 is a wasteful number, since it uses less digits than its factorization.

28163663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11517.

The product of its digits is 31104, while the sum is 35.

The square root of 28163663 is about 5306.9447896129. The cubic root of 28163663 is about 304.2493877803.

The spelling of 28163663 in words is "twenty-eight million, one hundred sixty-three thousand, six hundred sixty-three".