28647224 has 16 divisors (see below), whose sum is σ = 55446720. Its totient is φ = 13861440.

The previous prime is 28647221. The next prime is 28647341. The reversal of 28647224 is 42274682.

It is a happy number.

It is a super-3 number, since 3×28647224³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57509 + ... + 58004.

It is an arithmetic number, because the mean of its divisors is an integer number (3465420).

Almost surely, 2^28647224 is an apocalyptic number.

It is an amenable number.

28647224 is a deficient number, since it is larger than the sum of its proper divisors (26799496).

28647224 is a wasteful number, since it uses less digits than its factorization.

28647224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115550 (or 115546 counting only the distinct ones).

The product of its digits is 43008, while the sum is 35.

The square root of 28647224 is about 5352.3101554376. The cubic root of 28647224 is about 305.9808038993.

The spelling of 28647224 in words is "twenty-eight million, six hundred forty-seven thousand, two hundred twenty-four".