32221648 has 40 divisors (see below), whose sum is σ = 64995840. Its totient is φ = 15457920.

The previous prime is 32221633. The next prime is 32221667. The reversal of 32221648 is 84612223.

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, 82638 + ... + 83026.

It is an arithmetic number, because the mean of its divisors is an integer number (1624896).

Almost surely, 2^32221648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32221648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32497920).

32221648 is an abundant number, since it is smaller than the sum of its proper divisors (32774192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

32221648 is a wasteful number, since it uses less digits than its factorization.

32221648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 589 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 32221648 is about 5676.4115425152. The cubic root of 32221648 is about 318.2115333732.

The spelling of 32221648 in words is "thirty-two million, two hundred twenty-one thousand, six hundred forty-eight".