1028287 has 8 divisors (see below), whose sum is σ = 1121904. Its totient is φ = 936768.

The previous prime is 1028273. The next prime is 1028303. The reversal of 1028287 is 7828201.

1028287 is nontrivially palindromic in base 16.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028207) 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, 603 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (140238).

2^1028287 is an apocalyptic number.

1028287 is a deficient number, since it is larger than the sum of its proper divisors (93617).

1028287 is an equidigital number, since it uses as much as digits as its factorization.

1028287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1028287 is about 1014.0448708021. The cubic root of 1028287 is about 100.9341465305.

The spelling of 1028287 in words is "one million, twenty-eight thousand, two hundred eighty-seven".