28248775 has 6 divisors (see below), whose sum is σ = 35028512. Its totient is φ = 22599000.

The previous prime is 28248751. The next prime is 28248793. The reversal of 28248775 is 57784282.

It is not a de Polignac number, because 28248775 - 2⁵ = 28248743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564951 + ... + 565000.

Almost surely, 2^28248775 is an apocalyptic number.

28248775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28248775 is a deficient number, since it is larger than the sum of its proper divisors (6779737).

28248775 is a wasteful number, since it uses less digits than its factorization.

28248775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129961 (or 1129956 counting only the distinct ones).

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

The square root of 28248775 is about 5314.9576668117. The cubic root of 28248775 is about 304.5555651881. Note that the first 4 decimals are identical.

The spelling of 28248775 in words is "twenty-eight million, two hundred forty-eight thousand, seven hundred seventy-five".