32128645 has 8 divisors (see below), whose sum is σ = 38599704. Its totient is φ = 25672704.

The previous prime is 32128619. The next prime is 32128673. The reversal of 32128645 is 54682123.

It can be written as a sum of positive squares in 4 ways, for example, as 20629764 + 11498881 = 4542^2 + 3391^2 .

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 32128645 - 2¹⁷ = 31997573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597 + ... + 8173.

It is an arithmetic number, because the mean of its divisors is an integer number (4824963).

Almost surely, 2^32128645 is an apocalyptic number.

It is an amenable number.

32128645 is a deficient number, since it is larger than the sum of its proper divisors (6471059).

32128645 is an equidigital number, since it uses as much as digits as its factorization.

32128645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559.

The product of its digits is 11520, while the sum is 31.

The square root of 32128645 is about 5668.2135633725. The cubic root of 32128645 is about 317.9050815691.

The spelling of 32128645 in words is "thirty-two million, one hundred twenty-eight thousand, six hundred forty-five".