1328839 has 4 divisors (see below), whose sum is σ = 1407024. Its totient is φ = 1250656.

The previous prime is 1328827. The next prime is 1328843. The reversal of 1328839 is 9388231.

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

It is not a de Polignac number, because 1328839 - 2⁵ = 1328807 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 (1328539) 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, 39067 + ... + 39100.

It is an arithmetic number, because the mean of its divisors is an integer number (351756).

2^1328839 is an apocalyptic number.

1328839 is a deficient number, since it is larger than the sum of its proper divisors (78185).

1328839 is an equidigital number, since it uses as much as digits as its factorization.

1328839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78184.

The product of its digits is 10368, while the sum is 34.

The square root of 1328839 is about 1152.7527922326. The cubic root of 1328839 is about 109.9404360721.

The spelling of 1328839 in words is "one million, three hundred twenty-eight thousand, eight hundred thirty-nine".