32628009 has 4 divisors (see below), whose sum is σ = 43504016. Its totient is φ = 21752004.

The previous prime is 32627989. The next prime is 32628017. The reversal of 32628009 is 90082623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90082623 = 3 ⋅30027541.

It is a de Polignac number, because none of the positive numbers 2^k-32628009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32628809) 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, 5437999 + ... + 5438004.

It is an arithmetic number, because the mean of its divisors is an integer number (10876004).

Almost surely, 2^32628009 is an apocalyptic number.

It is an amenable number.

32628009 is a deficient number, since it is larger than the sum of its proper divisors (10876007).

32628009 is a wasteful number, since it uses less digits than its factorization.

32628009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876006.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 32628009 is about 5712.0932240292. The cubic root of 32628009 is about 319.5436496407.

The spelling of 32628009 in words is "thirty-two million, six hundred twenty-eight thousand, nine".