28224975 has 48 divisors (see below), whose sum is σ = 50889600. Its totient is φ = 13749120.

The previous prime is 28224971. The next prime is 28225003. The reversal of 28224975 is 57942282.

It is not a de Polignac number, because 28224975 - 2² = 28224971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28224971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40984 + ... + 41666.

It is an arithmetic number, because the mean of its divisors is an integer number (1060200).

Almost surely, 2^28224975 is an apocalyptic number.

28224975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28224975 is a deficient number, since it is larger than the sum of its proper divisors (22664625).

28224975 is a wasteful number, since it uses less digits than its factorization.

28224975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 739 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 28224975 is about 5312.7182308118. The cubic root of 28224975 is about 304.4700103391.

The spelling of 28224975 in words is "twenty-eight million, two hundred twenty-four thousand, nine hundred seventy-five".