1289328 has 20 divisors (see below), whose sum is σ = 3330888. Its totient is φ = 429760.

The previous prime is 1289303. The next prime is 1289329. The reversal of 1289328 is 8239821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289329) 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, 13383 + ... + 13478.

2^1289328 is an apocalyptic number.

It is an amenable number.

1289328 is an abundant number, since it is smaller than the sum of its proper divisors (2041560).

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

1289328 is a wasteful number, since it uses less digits than its factorization.

1289328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26872 (or 26866 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1289328 is about 1135.4857991186. The cubic root of 1289328 is about 108.8398174620.

It can be divided in two parts, 12893 and 28, that added together give a palindrome (12921).

The spelling of 1289328 in words is "one million, two hundred eighty-nine thousand, three hundred twenty-eight".