1328687 has 8 divisors (see below), whose sum is σ = 1421280. Its totient is φ = 1239040.

The previous prime is 1328683. The next prime is 1328699. The reversal of 1328687 is 7868231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1328687 - 2² = 1328683 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 (1328683) 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, 239 + ... + 1647.

It is an arithmetic number, because the mean of its divisors is an integer number (177660).

2^1328687 is an apocalyptic number.

1328687 is a deficient number, since it is larger than the sum of its proper divisors (92593).

1328687 is a wasteful number, since it uses less digits than its factorization.

1328687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its digits is 16128, while the sum is 35.

The square root of 1328687 is about 1152.6868612073. The cubic root of 1328687 is about 109.9362440460.

The spelling of 1328687 in words is "one million, three hundred twenty-eight thousand, six hundred eighty-seven".