28658241 has 12 divisors (see below), whose sum is σ = 41454868. Its totient is φ = 19077984.

The previous prime is 28658237. The next prime is 28658249. The reversal of 28658241 is 14285682.

It can be written as a sum of positive squares in 2 ways, for example, as 7535025 + 21123216 = 2745^2 + 4596^2 .

It is not a de Polignac number, because 28658241 - 2² = 28658237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28658196 and 28658205.

It is not an unprimeable number, because it can be changed into a prime (28658249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5811 + ... + 9543.

Almost surely, 2^28658241 is an apocalyptic number.

It is an amenable number.

28658241 is a deficient number, since it is larger than the sum of its proper divisors (12796627).

28658241 is a wasteful number, since it uses less digits than its factorization.

28658241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592 (or 4589 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28658241 is about 5353.3392382699. The cubic root of 28658241 is about 306.0200230394.

The spelling of 28658241 in words is "twenty-eight million, six hundred fifty-eight thousand, two hundred forty-one".