65327440 has 20 divisors (see below), whose sum is σ = 151886484. Its totient is φ = 26130944.

The previous prime is 65327419. The next prime is 65327461. The reversal of 65327440 is 4472356.

It is an interprime number because it is at equal distance from previous prime (65327419) and next prime (65327461).

It can be written as a sum of positive squares in 2 ways, for example, as 34012224 + 31315216 = 5832^2 + 5596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408217 + ... + 408376.

Almost surely, 2^65327440 is an apocalyptic number.

It is an amenable number.

65327440 is an abundant number, since it is smaller than the sum of its proper divisors (86559044).

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

65327440 is a wasteful number, since it uses less digits than its factorization.

65327440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816606 (or 816600 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 65327440 is about 8082.5392049776. The cubic root of 65327440 is about 402.7465973414.

Adding to 65327440 its reverse (4472356), we get a palindrome (69799796).

The spelling of 65327440 in words is "sixty-five million, three hundred twenty-seven thousand, four hundred forty".