28448473 has 4 divisors (see below), whose sum is σ = 28472500. Its totient is φ = 28424448.

The previous prime is 28448467. The next prime is 28448477. The reversal of 28448473 is 37484482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19430464 + 9018009 = 4408^2 + 3003^2 .

It is a cyclic number.

It is not a de Polignac number, because 28448473 - 2¹³ = 28440281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28448477) 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, 10140 + ... + 12637.

It is an arithmetic number, because the mean of its divisors is an integer number (7118125).

Almost surely, 2^28448473 is an apocalyptic number.

It is an amenable number.

28448473 is a deficient number, since it is larger than the sum of its proper divisors (24027).

28448473 is a wasteful number, since it uses less digits than its factorization.

28448473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24026.

The product of its digits is 172032, while the sum is 40.

The square root of 28448473 is about 5333.7109970451. The cubic root of 28448473 is about 305.2715417451.

The spelling of 28448473 in words is "twenty-eight million, four hundred forty-eight thousand, four hundred seventy-three".