1028993 has 8 divisors (see below), whose sum is σ = 1245312. Its totient is φ = 830016.

The previous prime is 1028981. The next prime is 1028999. The reversal of 1028993 is 3998201.

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 1028993 - 2⁸ = 1028737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1028999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4205 + ... + 4442.

It is an arithmetic number, because the mean of its divisors is an integer number (155664).

2^1028993 is an apocalyptic number.

It is an amenable number.

1028993 is a deficient number, since it is larger than the sum of its proper divisors (216319).

1028993 is an equidigital number, since it uses as much as digits as its factorization.

1028993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8671.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1028993 is about 1014.3929218996. The cubic root of 1028993 is about 100.9572409925.

The spelling of 1028993 in words is "one million, twenty-eight thousand, nine hundred ninety-three".