28005527 has 8 divisors (see below), whose sum is σ = 31053072. Its totient is φ = 25041600.

The previous prime is 28005521. The next prime is 28005529. The reversal of 28005527 is 72550082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28005527 - 2⁶ = 28005463 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 28005527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28005521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20198 + ... + 21539.

It is an arithmetic number, because the mean of its divisors is an integer number (3881634).

Almost surely, 2^28005527 is an apocalyptic number.

28005527 is a deficient number, since it is larger than the sum of its proper divisors (3047545).

28005527 is a wasteful number, since it uses less digits than its factorization.

28005527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41809.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 28005527 is about 5292.0248487701. The cubic root of 28005527 is about 303.6788759055.

It can be divided in two parts, 280055 and 27, that added together give a palindrome (280082).

The spelling of 28005527 in words is "twenty-eight million, five thousand, five hundred twenty-seven".