28757248 has 36 divisors (see below), whose sum is σ = 61824868. Its totient is φ = 13271040.

The previous prime is 28757231. The next prime is 28757269. The reversal of 28757248 is 84275782.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 26543104 = 1488^2 + 5152^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993 + ... + 7648.

Almost surely, 2^28757248 is an apocalyptic number.

It is an amenable number.

28757248 is an abundant number, since it is smaller than the sum of its proper divisors (33067620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28757248 is an equidigital number, since it uses as much as digits as its factorization.

28757248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8670 (or 8656 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 28757248 is about 5362.5784842741. The cubic root of 28757248 is about 306.3720253417.

The spelling of 28757248 in words is "twenty-eight million, seven hundred fifty-seven thousand, two hundred forty-eight".