28840573 has 4 divisors (see below), whose sum is σ = 29511328. Its totient is φ = 28169820.

The previous prime is 28840561. The next prime is 28840583. The reversal of 28840573 is 37504882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37504882 = 2 ⋅18752441.

It is a cyclic number.

It is not a de Polignac number, because 28840573 - 2⁵ = 28840541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840523) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 335313 + ... + 335398.

It is an arithmetic number, because the mean of its divisors is an integer number (7377832).

Almost surely, 2^28840573 is an apocalyptic number.

It is an amenable number.

28840573 is a deficient number, since it is larger than the sum of its proper divisors (670755).

28840573 is an equidigital number, since it uses as much as digits as its factorization.

28840573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670754.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28840573 is about 5370.3419816619. The cubic root of 28840573 is about 306.6676474186.

The spelling of 28840573 in words is "twenty-eight million, eight hundred forty thousand, five hundred seventy-three".