1028819 has 4 divisors (see below), whose sum is σ = 1122360. Its totient is φ = 935280.

The previous prime is 1028809. The next prime is 1028837. The reversal of 1028819 is 9188201.

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 1028819 - 2⁴ = 1028803 is a prime.

It is a super-2 number, since 2×1028819² = 2116937069522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1028791 and 1028800.

It is not an unprimeable number, because it can be changed into a prime (1028809) 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 3 ways as a sum of consecutive naturals, for example, 46754 + ... + 46775.

It is an arithmetic number, because the mean of its divisors is an integer number (280590).

2^1028819 is an apocalyptic number.

1028819 is a deficient number, since it is larger than the sum of its proper divisors (93541).

1028819 is an equidigital number, since it uses as much as digits as its factorization.

1028819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93540.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1028819 is about 1014.3071526909. The cubic root of 1028819 is about 100.9515501374.

The spelling of 1028819 in words is "one million, twenty-eight thousand, eight hundred nineteen".