28645248 has 32 divisors (see below), whose sum is σ = 76089960. Its totient is φ = 9548288.

The previous prime is 28645237. The next prime is 28645283. The reversal of 28645248 is 84254682.

It is a tau number, because it is divible by the number of its divisors (32).

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, 36915 + ... + 37682.

Almost surely, 2^28645248 is an apocalyptic number.

It is an amenable number.

28645248 is an abundant number, since it is smaller than the sum of its proper divisors (47444712).

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

28645248 is an equidigital number, since it uses as much as digits as its factorization.

28645248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74614 (or 74602 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The square root of 28645248 is about 5352.1255590653. The cubic root of 28645248 is about 305.9737685233.

The spelling of 28645248 in words is "twenty-eight million, six hundred forty-five thousand, two hundred forty-eight".