28748224 has 28 divisors (see below), whose sum is σ = 60405264. Its totient is φ = 13528064.

The previous prime is 28748221. The next prime is 28748231. The reversal of 28748224 is 42284782.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28748221) 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, 12124 + ... + 14299.

Almost surely, 2^28748224 is an apocalyptic number.

It is an amenable number.

28748224 is an abundant number, since it is smaller than the sum of its proper divisors (31657040).

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

28748224 is a wasteful number, since it uses less digits than its factorization.

28748224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26452 (or 26442 counting only the distinct ones).

The product of its digits is 57344, while the sum is 37.

The square root of 28748224 is about 5361.7370319701. The cubic root of 28748224 is about 306.3399755620.

The spelling of 28748224 in words is "twenty-eight million, seven hundred forty-eight thousand, two hundred twenty-four".