1290328 has 32 divisors (see below), whose sum is σ = 2746800. Its totient is φ = 563328.

The previous prime is 1290319. The next prime is 1290329. The reversal of 1290328 is 8230921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650 + ... + 2302.

2^1290328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373400).

1290328 is an abundant number, since it is smaller than the sum of its proper divisors (1456472).

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

1290328 is a wasteful number, since it uses less digits than its factorization.

1290328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1290328 is about 1135.9260539313. The cubic root of 1290328 is about 108.8679488325.

It can be divided in two parts, 129032 and 8, that multiplied together give a square (1032256 = 1016²).

The spelling of 1290328 in words is "one million, two hundred ninety thousand, three hundred twenty-eight".