28488573 has 6 divisors (see below), whose sum is σ = 41150174. Its totient is φ = 18992376.

The previous prime is 28488569. The next prime is 28488589. The reversal of 28488573 is 37588482.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 12830724 = 3957^2 + 3582^2 .

It is not a de Polignac number, because 28488573 - 2² = 28488569 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 (28488503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1582690 + ... + 1582707.

Almost surely, 2^28488573 is an apocalyptic number.

It is an amenable number.

28488573 is a deficient number, since it is larger than the sum of its proper divisors (12661601).

28488573 is a wasteful number, since it uses less digits than its factorization.

28488573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165403 (or 3165400 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 28488573 is about 5337.4687821101. The cubic root of 28488573 is about 305.4149078659.

Subtracting 28488573 from its reverse (37588482), we obtain a palindrome (9099909).

It can be divided in two parts, 28 and 488573, that added together give a square (488601 = 699²).

The spelling of 28488573 in words is "twenty-eight million, four hundred eighty-eight thousand, five hundred seventy-three".