28107525 has 24 divisors (see below), whose sum is σ = 48077280. Its totient is φ = 14472640.

The previous prime is 28107487. The next prime is 28107529. The reversal of 28107525 is 52570182.

It is not a de Polignac number, because 28107525 - 2⁶ = 28107461 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28107492 and 28107501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28107529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4287 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (2003220).

Almost surely, 2^28107525 is an apocalyptic number.

28107525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28107525 is a deficient number, since it is larger than the sum of its proper divisors (19969755).

28107525 is a wasteful number, since it uses less digits than its factorization.

28107525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965 (or 12960 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 28107525 is about 5301.6530440986. The cubic root of 28107525 is about 304.0471021487.

The spelling of 28107525 in words is "twenty-eight million, one hundred seven thousand, five hundred twenty-five".