28604473 has 4 divisors (see below), whose sum is σ = 28643920. Its totient is φ = 28565028.

The previous prime is 28604467. The next prime is 28604483. The reversal of 28604473 is 37440682.

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 28604473 - 2⁹ = 28603961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28604423) 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, 18615 + ... + 20092.

It is an arithmetic number, because the mean of its divisors is an integer number (7160980).

Almost surely, 2^28604473 is an apocalyptic number.

It is an amenable number.

28604473 is a deficient number, since it is larger than the sum of its proper divisors (39447).

28604473 is an equidigital number, since it uses as much as digits as its factorization.

28604473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39446.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 28604473 is about 5348.3149682867. The cubic root of 28604473 is about 305.8285204089.

The spelling of 28604473 in words is "twenty-eight million, six hundred four thousand, four hundred seventy-three".