28715527 has 4 divisors (see below), whose sum is σ = 28726776. Its totient is φ = 28704280.

The previous prime is 28715507. The next prime is 28715549. The reversal of 28715527 is 72551782.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28715527 - 2²³ = 20326919 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 (28715507) 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, 252 + ... + 7582.

It is an arithmetic number, because the mean of its divisors is an integer number (7181694).

Almost surely, 2^28715527 is an apocalyptic number.

28715527 is a deficient number, since it is larger than the sum of its proper divisors (11249).

28715527 is an equidigital number, since it uses as much as digits as its factorization.

28715527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11248.

The product of its digits is 39200, while the sum is 37.

The square root of 28715527 is about 5358.6870593458. The cubic root of 28715527 is about 306.2237921763.

The spelling of 28715527 in words is "twenty-eight million, seven hundred fifteen thousand, five hundred twenty-seven".