32660720 has 40 divisors (see below), whose sum is σ = 77378976. Its totient is φ = 12816128.

The previous prime is 32660707. The next prime is 32660731. The reversal of 32660720 is 2706623.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 32660720.

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, 389 + ... + 8091.

Almost surely, 2^32660720 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 32660720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38689488).

32660720 is an abundant number, since it is smaller than the sum of its proper divisors (44718256).

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

32660720 is a wasteful number, since it uses less digits than its factorization.

32660720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7769 (or 7763 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 32660720 is about 5714.9558178520. The cubic root of 32660720 is about 319.6503994499.

The spelling of 32660720 in words is "thirty-two million, six hundred sixty thousand, seven hundred twenty".