28347224 has 16 divisors (see below), whose sum is σ = 55462320. Its totient is φ = 13557280.

The previous prime is 28347197. The next prime is 28347229. The reversal of 28347224 is 42274382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347229) by changing a digit.

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, 76847 + ... + 77214.

It is an arithmetic number, because the mean of its divisors is an integer number (3466395).

Almost surely, 2^28347224 is an apocalyptic number.

It is an amenable number.

28347224 is a deficient number, since it is larger than the sum of its proper divisors (27115096).

28347224 is a wasteful number, since it uses less digits than its factorization.

28347224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154090 (or 154086 counting only the distinct ones).

The product of its digits is 21504, while the sum is 32.

The square root of 28347224 is about 5324.2111152733. The cubic root of 28347224 is about 304.9089542812.

The spelling of 28347224 in words is "twenty-eight million, three hundred forty-seven thousand, two hundred twenty-four".