1028839 has 4 divisors (see below), whose sum is σ = 1175824. Its totient is φ = 881856.

The previous prime is 1028837. The next prime is 1028843. The reversal of 1028839 is 9388201.

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 1028839 - 2¹ = 1028837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028837) 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, 73482 + ... + 73495.

It is an arithmetic number, because the mean of its divisors is an integer number (293956).

2^1028839 is an apocalyptic number.

1028839 is a deficient number, since it is larger than the sum of its proper divisors (146985).

1028839 is an equidigital number, since it uses as much as digits as its factorization.

1028839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146984.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1028839 is about 1014.3170115896. The cubic root of 1028839 is about 100.9522042913.

The spelling of 1028839 in words is "one million, twenty-eight thousand, eight hundred thirty-nine".