28430224 has 45 divisors (see below), whose sum is σ = 58272219. Its totient is φ = 13436640.

The previous prime is 28430219. The next prime is 28430263. The reversal of 28430224 is 42203482.

The square root of 28430224 is 5332.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 661147 + ... + 661189.

Almost surely, 2^28430224 is an apocalyptic number.

28430224 is the 5332-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28430224

28430224 is an abundant number, since it is smaller than the sum of its proper divisors (29841995).

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

28430224 is an equidigital number, since it uses as much as digits as its factorization.

28430224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The cubic root of 28430224 is about 305.2062530389.

Multiplying 28430224 by its sum of digits (25), we get a square (710755600 = 26660²).

The spelling of 28430224 in words is "twenty-eight million, four hundred thirty thousand, two hundred twenty-four".