28449224 has 16 divisors (see below), whose sum is σ = 53423820. Its totient is φ = 14202880.

The previous prime is 28449217. The next prime is 28449233. The reversal of 28449224 is 42294482.

It can be written as a sum of positive squares in 2 ways, for example, as 28281124 + 168100 = 5318^2 + 410^2 .

It is an unprimeable number.

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, 3752 + ... + 8424.

Almost surely, 2^28449224 is an apocalyptic number.

It is an amenable number.

28449224 is a deficient number, since it is larger than the sum of its proper divisors (24974596).

28449224 is a wasteful number, since it uses less digits than its factorization.

28449224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440 (or 5436 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 28449224 is about 5333.7813978452. The cubic root of 28449224 is about 305.2742279691.

The spelling of 28449224 in words is "twenty-eight million, four hundred forty-nine thousand, two hundred twenty-four".