28489017 has 4 divisors (see below), whose sum is σ = 37985360. Its totient is φ = 18992676.

The previous prime is 28489007. The next prime is 28489057. The reversal of 28489017 is 71098482.

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 not a de Polignac number, because 28489017 - 2⁶ = 28488953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28489007) 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, 4748167 + ... + 4748172.

It is an arithmetic number, because the mean of its divisors is an integer number (9496340).

Almost surely, 2^28489017 is an apocalyptic number.

It is an amenable number.

28489017 is a deficient number, since it is larger than the sum of its proper divisors (9496343).

28489017 is an equidigital number, since it uses as much as digits as its factorization.

28489017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496342.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 28489017 is about 5337.5103746972. The cubic root of 28489017 is about 305.4164945080.

The spelling of 28489017 in words is "twenty-eight million, four hundred eighty-nine thousand, seventeen".