1028289 has 8 divisors (see below), whose sum is σ = 1376352. Its totient is φ = 682880.

The previous prime is 1028273. The next prime is 1028303. The reversal of 1028289 is 9828201.

1028289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028289 - 2⁴ = 1028273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1028089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (172044).

2^1028289 is an apocalyptic number.

It is an amenable number.

1028289 is a deficient number, since it is larger than the sum of its proper divisors (348063).

1028289 is an equidigital number, since it uses as much as digits as its factorization.

1028289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1028289 is about 1014.0458569513. The cubic root of 1028289 is about 100.9342119688.

The spelling of 1028289 in words is "one million, twenty-eight thousand, two hundred eighty-nine".