28663008 has 48 divisors (see below), whose sum is σ = 82083456. Its totient is φ = 8685440.

The previous prime is 28663007. The next prime is 28663027. The reversal of 28663008 is 80036682.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 28663008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28663007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12516 + ... + 14627.

It is an arithmetic number, because the mean of its divisors is an integer number (1710072).

Almost surely, 2^28663008 is an apocalyptic number.

It is an amenable number.

28663008 is an abundant number, since it is smaller than the sum of its proper divisors (53420448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28663008 is a wasteful number, since it uses less digits than its factorization.

28663008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27167 (or 27159 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 28663008 is about 5353.7844558779. The cubic root of 28663008 is about 306.0369898468.

The spelling of 28663008 in words is "twenty-eight million, six hundred sixty-three thousand, eight".