1304428 has 12 divisors (see below), whose sum is σ = 2310840. Its totient is φ = 644192.

The previous prime is 1304419. The next prime is 1304477. The reversal of 1304428 is 8244031.

It is a junction number, because it is equal to n+sod(n) for n = 1304399 and 1304408.

It is an unprimeable number.

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, 1633 + ... + 2296.

It is an arithmetic number, because the mean of its divisors is an integer number (192570).

2^1304428 is an apocalyptic number.

It is an amenable number.

1304428 is a deficient number, since it is larger than the sum of its proper divisors (1006412).

1304428 is a wasteful number, since it uses less digits than its factorization.

1304428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1304428 is about 1142.1155808411. The cubic root of 1304428 is about 109.2630629494.

Adding to 1304428 its reverse (8244031), we get a palindrome (9548459).

The spelling of 1304428 in words is "one million, three hundred four thousand, four hundred twenty-eight".