28014663 has 4 divisors (see below), whose sum is σ = 37352888. Its totient is φ = 18676440.

The previous prime is 28014659. The next prime is 28014689. The reversal of 28014663 is 36641082.

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

It is not a de Polignac number, because 28014663 - 2² = 28014659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28014663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28014653) 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, 4669108 + ... + 4669113.

It is an arithmetic number, because the mean of its divisors is an integer number (9338222).

Almost surely, 2^28014663 is an apocalyptic number.

28014663 is a deficient number, since it is larger than the sum of its proper divisors (9338225).

28014663 is an equidigital number, since it uses as much as digits as its factorization.

28014663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338224.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 28014663 is about 5292.8879640514. The cubic root of 28014663 is about 303.7118944900.

The spelling of 28014663 in words is "twenty-eight million, fourteen thousand, six hundred sixty-three".