65040732 has 60 divisors (see below), whose sum is σ = 171060120. Its totient is φ = 21549024.

The previous prime is 65040727. The next prime is 65040733. The reversal of 65040732 is 23704056.

It is a happy number.

65040732 is a `hidden beast` number, since 650 + 4 + 0 + 7 + 3 + 2 = 666.

65040732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 65040696 and 65040705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65040733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63319 + ... + 64337.

It is an arithmetic number, because the mean of its divisors is an integer number (2851002).

Almost surely, 2^65040732 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 65040732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85530060).

65040732 is an abundant number, since it is smaller than the sum of its proper divisors (106019388).

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

65040732 is a wasteful number, since it uses less digits than its factorization.

65040732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 65040732 is about 8064.7834440858. The cubic root of 65040732 is about 402.1565440663.

Adding to 65040732 its reverse (23704056), we get a palindrome (88744788).

The spelling of 65040732 in words is "sixty-five million, forty thousand, seven hundred thirty-two".