65305632 has 72 divisors (see below), whose sum is σ = 199429776. Its totient is φ = 18657408.

The previous prime is 65305621. The next prime is 65305649. The reversal of 65305632 is 23650356.

It is a self number, because there is not a number n which added to its sum of digits gives 65305632.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2238 + ... + 11645.

It is an arithmetic number, because the mean of its divisors is an integer number (2769858).

Almost surely, 2^65305632 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 65305632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99714888).

65305632 is an abundant number, since it is smaller than the sum of its proper divisors (134124144).

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

65305632 is a wasteful number, since it uses less digits than its factorization.

65305632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910 (or 13895 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 65305632 is about 8081.1900113783. The cubic root of 65305632 is about 402.7017765876.

Adding to 65305632 its reverse (23650356), we get a palindrome (88955988).

The spelling of 65305632 in words is "sixty-five million, three hundred five thousand, six hundred thirty-two".