1028791 has 4 divisors (see below), whose sum is σ = 1031152. Its totient is φ = 1026432.

The previous prime is 1028777. The next prime is 1028803. The reversal of 1028791 is 1978201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1028791 - 2⁷ = 1028663 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 (1028761) 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, 315 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (257788).

2^1028791 is an apocalyptic number.

1028791 is a deficient number, since it is larger than the sum of its proper divisors (2361).

1028791 is an equidigital number, since it uses as much as digits as its factorization.

1028791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1028791 is about 1014.2933500719. The cubic root of 1028791 is about 100.9506343077.

The spelling of 1028791 in words is "one million, twenty-eight thousand, seven hundred ninety-one".