1028311 has 8 divisors (see below), whose sum is σ = 1083600. Its totient is φ = 974400.

The previous prime is 1028309. The next prime is 1028317. The reversal of 1028311 is 1138201.

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

It is not a de Polignac number, because 1028311 - 2¹ = 1028309 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 (1028317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (135450).

2^1028311 is an apocalyptic number.

1028311 is the 454-th centered decagonal number.

1028311 is a deficient number, since it is larger than the sum of its proper divisors (55289).

1028311 is an equidigital number, since it uses as much as digits as its factorization.

1028311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1028311 is about 1014.0567045289. The cubic root of 1028311 is about 100.9349317849.

The spelling of 1028311 in words is "one million, twenty-eight thousand, three hundred eleven".