32020640 has 96 divisors (see below), whose sum is σ = 80196480. Its totient is φ = 12063744.

The previous prime is 32020633. The next prime is 32020661. The reversal of 32020640 is 4602023.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310829 + ... + 310931.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^32020640 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 32020640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40098240).

32020640 is an abundant number, since it is smaller than the sum of its proper divisors (48175840).

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

32020640 is a wasteful number, since it uses less digits than its factorization.

32020640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 32020640 is about 5658.6782909086. The cubic root of 32020640 is about 317.5484539686.

Adding to 32020640 its reverse (4602023), we get a palindrome (36622663).

The spelling of 32020640 in words is "thirty-two million, twenty thousand, six hundred forty".