28708063 has 4 divisors (see below), whose sum is σ = 28743120. Its totient is φ = 28673008.

The previous prime is 28708051. The next prime is 28708073. The reversal of 28708063 is 36080782.

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 28708063 - 2⁹ = 28707551 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 (28708073) 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, 16270 + ... + 17947.

It is an arithmetic number, because the mean of its divisors is an integer number (7185780).

Almost surely, 2^28708063 is an apocalyptic number.

28708063 is a deficient number, since it is larger than the sum of its proper divisors (35057).

28708063 is an equidigital number, since it uses as much as digits as its factorization.

28708063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35056.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28708063 is about 5357.9905748331. The cubic root of 28708063 is about 306.1972577228.

The spelling of 28708063 in words is "twenty-eight million, seven hundred eight thousand, sixty-three".