32216646 has 64 divisors (see below), whose sum is σ = 81077760. Its totient is φ = 8290560.

The previous prime is 32216641. The next prime is 32216669. The reversal of 32216646 is 64661223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32216641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63040 + ... + 63548.

It is an arithmetic number, because the mean of its divisors is an integer number (1266840).

Almost surely, 2^32216646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32216646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40538880).

32216646 is an abundant number, since it is smaller than the sum of its proper divisors (48861114).

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

32216646 is a wasteful number, since it uses less digits than its factorization.

32216646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its digits is 10368, while the sum is 30.

The square root of 32216646 is about 5675.9709301581. The cubic root of 32216646 is about 318.1950664267.

Adding to 32216646 its reverse (64661223), we get a palindrome (96877869).

The spelling of 32216646 in words is "thirty-two million, two hundred sixteen thousand, six hundred forty-six".