32128397 has 4 divisors (see below), whose sum is σ = 36718176. Its totient is φ = 27538620.

The previous prime is 32128363. The next prime is 32128409. The reversal of 32128397 is 79382123.

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.

It is a cyclic number.

It is not a de Polignac number, because 32128397 - 2¹⁸ = 31866253 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 (32128357) 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, 2294879 + ... + 2294892.

It is an arithmetic number, because the mean of its divisors is an integer number (9179544).

Almost surely, 2^32128397 is an apocalyptic number.

It is an amenable number.

32128397 is a deficient number, since it is larger than the sum of its proper divisors (4589779).

32128397 is an equidigital number, since it uses as much as digits as its factorization.

32128397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589778.

The product of its digits is 18144, while the sum is 35.

The square root of 32128397 is about 5668.1916869492. The cubic root of 32128397 is about 317.9042636006.

The spelling of 32128397 in words is "thirty-two million, one hundred twenty-eight thousand, three hundred ninety-seven".