28224003 has 8 divisors (see below), whose sum is σ = 37661008. Its totient is φ = 18801504.

The previous prime is 28223941. The next prime is 28224011. The reversal of 28224003 is 30042282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28224003 - 2¹⁰ = 28222979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28224023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 7857.

It is an arithmetic number, because the mean of its divisors is an integer number (4707626).

Almost surely, 2^28224003 is an apocalyptic number.

28224003 is a deficient number, since it is larger than the sum of its proper divisors (9437005).

28224003 is a wasteful number, since it uses less digits than its factorization.

28224003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 28224003 is about 5312.6267514291. The cubic root of 28224003 is about 304.4665152283.

Adding to 28224003 its reverse (30042282), we get a palindrome (58266285).

The spelling of 28224003 in words is "twenty-eight million, two hundred twenty-four thousand, three".