1304028 has 72 divisors (see below), whose sum is σ = 3734640. Its totient is φ = 380160.

The previous prime is 1304003. The next prime is 1304029. The reversal of 1304028 is 8204031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1304028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304029) 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 23 ways as a sum of consecutive naturals, for example, 14608 + ... + 14696.

It is an arithmetic number, because the mean of its divisors is an integer number (51870).

2^1304028 is an apocalyptic number.

1304028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1304028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867320).

1304028 is an abundant number, since it is smaller than the sum of its proper divisors (2430612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1304028 is a wasteful number, since it uses less digits than its factorization.

1304028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1304028 is about 1141.9404537891. The cubic root of 1304028 is about 109.2518933810.

Adding to 1304028 its reverse (8204031), we get a palindrome (9508059).

The spelling of 1304028 in words is "one million, three hundred four thousand, twenty-eight".