28032573 has 4 divisors (see below), whose sum is σ = 37376768. Its totient is φ = 18688380.

The previous prime is 28032553. The next prime is 28032617. The reversal of 28032573 is 37523082.

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.

It is not a de Polignac number, because 28032573 - 2⁸ = 28032317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28032573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4672093 + ... + 4672098.

It is an arithmetic number, because the mean of its divisors is an integer number (9344192).

Almost surely, 2^28032573 is an apocalyptic number.

It is an amenable number.

28032573 is a deficient number, since it is larger than the sum of its proper divisors (9344195).

28032573 is an equidigital number, since it uses as much as digits as its factorization.

28032573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9344194.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 28032573 is about 5294.5795867094. The cubic root of 28032573 is about 303.7766025237.

The spelling of 28032573 in words is "twenty-eight million, thirty-two thousand, five hundred seventy-three".