28813663 has 6 divisors (see below), whose sum is σ = 29774112. Its totient is φ = 27883260.

The previous prime is 28813627. The next prime is 28813723. The reversal of 28813663 is 36631882.

It is not a de Polignac number, because 28813663 - 2¹³ = 28805471 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 (28853663) 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 5 ways as a sum of consecutive naturals, for example, 14031 + ... + 15952.

It is an arithmetic number, because the mean of its divisors is an integer number (4962352).

Almost surely, 2^28813663 is an apocalyptic number.

28813663 is a deficient number, since it is larger than the sum of its proper divisors (960449).

28813663 is an equidigital number, since it uses as much as digits as its factorization.

28813663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30045 (or 30014 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 28813663 is about 5367.8359699231. The cubic root of 28813663 is about 306.5722379135.

The spelling of 28813663 in words is "twenty-eight million, eight hundred thirteen thousand, six hundred sixty-three".