28027525 has 6 divisors (see below), whose sum is σ = 34754162. Its totient is φ = 22422000.

The previous prime is 28027511. The next prime is 28027561. The reversal of 28027525 is 52572082.

It can be written as a sum of positive squares in 3 ways, for example, as 1089 + 28026436 = 33^2 + 5294^2 .

It is not a de Polignac number, because 28027525 - 2⁷ = 28027397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 560526 + ... + 560575.

Almost surely, 2^28027525 is an apocalyptic number.

28027525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28027525 is a deficient number, since it is larger than the sum of its proper divisors (6726637).

28027525 is a wasteful number, since it uses less digits than its factorization.

28027525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121111 (or 1121106 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28027525 is about 5294.1028512865. The cubic root of 28027525 is about 303.7583671142.

The spelling of 28027525 in words is "twenty-eight million, twenty-seven thousand, five hundred twenty-five".