32808421 has 4 divisors (see below), whose sum is σ = 34535200. Its totient is φ = 31081644.

The previous prime is 32808403. The next prime is 32808427. The reversal of 32808421 is 12480823.

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 de Polignac number, because none of the positive numbers 2^k-32808421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32808421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32808427) 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, 863361 + ... + 863398.

It is an arithmetic number, because the mean of its divisors is an integer number (8633800).

Almost surely, 2^32808421 is an apocalyptic number.

It is an amenable number.

32808421 is a deficient number, since it is larger than the sum of its proper divisors (1726779).

32808421 is a wasteful number, since it uses less digits than its factorization.

32808421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726778.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 32808421 is about 5727.8635633192. The cubic root of 32808421 is about 320.1315247100.

The spelling of 32808421 in words is "thirty-two million, eight hundred eight thousand, four hundred twenty-one".