15328493 has 4 divisors (see below), whose sum is σ = 15349500. Its totient is φ = 15307488.

The previous prime is 15328487. The next prime is 15328513. The reversal of 15328493 is 39482351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6959044 + 8369449 = 2638^2 + 2893^2 .

It is a cyclic number.

It is not a de Polignac number, because 15328493 - 2¹⁰ = 15327469 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 (15328483) 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, 9368 + ... + 10881.

It is an arithmetic number, because the mean of its divisors is an integer number (3837375).

Almost surely, 2^15328493 is an apocalyptic number.

It is an amenable number.

15328493 is a deficient number, since it is larger than the sum of its proper divisors (21007).

15328493 is an equidigital number, since it uses as much as digits as its factorization.

15328493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21006.

The product of its digits is 25920, while the sum is 35.

The square root of 15328493 is about 3915.1619379024. The cubic root of 15328493 is about 248.4085195920.

The spelling of 15328493 in words is "fifteen million, three hundred twenty-eight thousand, four hundred ninety-three".