28747573 has 4 divisors (see below), whose sum is σ = 29234880. Its totient is φ = 28260268.

The previous prime is 28747567. The next prime is 28747577. The reversal of 28747573 is 37574782.

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 a cyclic number.

It is not a de Polignac number, because 28747573 - 2⁵ = 28747541 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 (28747577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243565 + ... + 243682.

It is an arithmetic number, because the mean of its divisors is an integer number (7308720).

Almost surely, 2^28747573 is an apocalyptic number.

It is an amenable number.

28747573 is a deficient number, since it is larger than the sum of its proper divisors (487307).

28747573 is an equidigital number, since it uses as much as digits as its factorization.

28747573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487306.

The product of its digits is 329280, while the sum is 43.

The square root of 28747573 is about 5361.6763236883. The cubic root of 28747573 is about 306.3376632008.

The spelling of 28747573 in words is "twenty-eight million, seven hundred forty-seven thousand, five hundred seventy-three".