28248285 has 32 divisors (see below), whose sum is σ = 50254848. Its totient is φ = 13455360.

The previous prime is 28248281. The next prime is 28248287. The reversal of 28248285 is 58284282.

It is not a de Polignac number, because 28248285 - 2² = 28248281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28248281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3709 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (1570464).

Almost surely, 2^28248285 is an apocalyptic number.

It is an amenable number.

28248285 is a deficient number, since it is larger than the sum of its proper divisors (22006563).

28248285 is a wasteful number, since it uses less digits than its factorization.

28248285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725.

The product of its digits is 81920, while the sum is 39.

The square root of 28248285 is about 5314.9115702898. The cubic root of 28248285 is about 304.5538042494.

The spelling of 28248285 in words is "twenty-eight million, two hundred forty-eight thousand, two hundred eighty-five".