28708527 has 4 divisors (see below), whose sum is σ = 38278040. Its totient is φ = 19139016.

The previous prime is 28708523. The next prime is 28708541. The reversal of 28708527 is 72580782.

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

It is not a de Polignac number, because 28708527 - 2² = 28708523 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 (28708523) 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, 4784752 + ... + 4784757.

It is an arithmetic number, because the mean of its divisors is an integer number (9569510).

Almost surely, 2^28708527 is an apocalyptic number.

28708527 is a deficient number, since it is larger than the sum of its proper divisors (9569513).

28708527 is an equidigital number, since it uses as much as digits as its factorization.

28708527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9569512.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 28708527 is about 5358.0338744730. The cubic root of 28708527 is about 306.1989073727.

The spelling of 28708527 in words is "twenty-eight million, seven hundred eight thousand, five hundred twenty-seven".