28248525 has 36 divisors (see below), whose sum is σ = 50913408. Its totient is φ = 14971680.

The previous prime is 28248503. The next prime is 28248547. The reversal of 28248525 is 52584282.

It is an interprime number because it is at equal distance from previous prime (28248503) and next prime (28248547).

It is not a de Polignac number, because 28248525 - 2⁶ = 28248461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28248525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49894 + ... + 50456.

Almost surely, 2^28248525 is an apocalyptic number.

28248525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28248525 is a deficient number, since it is larger than the sum of its proper divisors (22664883).

28248525 is a wasteful number, since it uses less digits than its factorization.

28248525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 794 counting only the distinct ones).

The product of its digits is 51200, while the sum is 36.

The square root of 28248525 is about 5314.9341482280. The cubic root of 28248525 is about 304.5546667525.

The spelling of 28248525 in words is "twenty-eight million, two hundred forty-eight thousand, five hundred twenty-five".