28532241 has 6 divisors (see below), whose sum is σ = 41213250. Its totient is φ = 19021488.

The previous prime is 28532237. The next prime is 28532261. The reversal of 28532241 is 14223582.

It can be written as a sum of positive squares in only one way, i.e., 28515600 + 16641 = 5340^2 + 129^2 .

It is not a de Polignac number, because 28532241 - 2² = 28532237 is a prime.

It is a super-3 number, since 3×28532241³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28532261) 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 5 ways as a sum of consecutive naturals, for example, 1585116 + ... + 1585133.

It is an arithmetic number, because the mean of its divisors is an integer number (6868875).

Almost surely, 2^28532241 is an apocalyptic number.

It is an amenable number.

28532241 is a deficient number, since it is larger than the sum of its proper divisors (12681009).

28532241 is a wasteful number, since it uses less digits than its factorization.

28532241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170255 (or 3170252 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28532241 is about 5341.5579188098. The cubic root of 28532241 is about 305.5708774147.

The spelling of 28532241 in words is "twenty-eight million, five hundred thirty-two thousand, two hundred forty-one".