28958289 has 4 divisors (see below), whose sum is σ = 38611056. Its totient is φ = 19305524.

The previous prime is 28958263. The next prime is 28958291. The reversal of 28958289 is 98285982.

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 28958289 - 2⁵ = 28958257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28958239) 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, 4826379 + ... + 4826384.

It is an arithmetic number, because the mean of its divisors is an integer number (9652764).

Almost surely, 2^28958289 is an apocalyptic number.

It is an amenable number.

28958289 is a deficient number, since it is larger than the sum of its proper divisors (9652767).

28958289 is an equidigital number, since it uses as much as digits as its factorization.

28958289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652766.

The product of its digits is 829440, while the sum is 51.

The square root of 28958289 is about 5381.2906444458. The cubic root of 28958289 is about 307.0843137228.

The spelling of 28958289 in words is "twenty-eight million, nine hundred fifty-eight thousand, two hundred eighty-nine".