28814663 has 4 divisors (see below), whose sum is σ = 29008200. Its totient is φ = 28621128.

The previous prime is 28814647. The next prime is 28814689. The reversal of 28814663 is 36641882.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28814663 - 2⁴ = 28814647 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 (28814693) 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, 96545 + ... + 96842.

It is an arithmetic number, because the mean of its divisors is an integer number (7252050).

Almost surely, 2^28814663 is an apocalyptic number.

28814663 is a deficient number, since it is larger than the sum of its proper divisors (193537).

28814663 is a wasteful number, since it uses less digits than its factorization.

28814663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193536.

The product of its digits is 55296, while the sum is 38.

The square root of 28814663 is about 5367.9291165216. The cubic root of 28814663 is about 306.5757844797.

The spelling of 28814663 in words is "twenty-eight million, eight hundred fourteen thousand, six hundred sixty-three".