28689241 has 4 divisors (see below), whose sum is σ = 32787712. Its totient is φ = 24590772.

The previous prime is 28689209. The next prime is 28689247. The reversal of 28689241 is 14298682.

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 28689241 - 2⁵ = 28689209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28689194 and 28689203.

It is not an unprimeable number, because it can be changed into a prime (28689247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2049225 + ... + 2049238.

It is an arithmetic number, because the mean of its divisors is an integer number (8196928).

Almost surely, 2^28689241 is an apocalyptic number.

It is an amenable number.

28689241 is a deficient number, since it is larger than the sum of its proper divisors (4098471).

28689241 is an equidigital number, since it uses as much as digits as its factorization.

28689241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098470.

The product of its digits is 55296, while the sum is 40.

The square root of 28689241 is about 5356.2338447831. The cubic root of 28689241 is about 306.1303252519.

The spelling of 28689241 in words is "twenty-eight million, six hundred eighty-nine thousand, two hundred forty-one".