32728609 has 8 divisors (see below), whose sum is σ = 35075520. Its totient is φ = 30458736.

The previous prime is 32728567. The next prime is 32728627. The reversal of 32728609 is 90682723.

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 32728609 - 2⁷ = 32728481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32728639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18379 + ... + 20080.

It is an arithmetic number, because the mean of its divisors is an integer number (4384440).

Almost surely, 2^32728609 is an apocalyptic number.

It is an amenable number.

32728609 is a deficient number, since it is larger than the sum of its proper divisors (2346911).

32728609 is a wasteful number, since it uses less digits than its factorization.

32728609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38519.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 32728609 is about 5720.8923255031. The cubic root of 32728609 is about 319.8717226733.

It can be divided in two parts, 3272 and 8609, that added together give a square (11881 = 109²).

The spelling of 32728609 in words is "thirty-two million, seven hundred twenty-eight thousand, six hundred nine".