65506240 has 28 divisors (see below), whose sum is σ = 155987496. Its totient is φ = 26202368.

The previous prime is 65506237. The next prime is 65506267. The reversal of 65506240 is 4260556.

It is a junction number, because it is equal to n+sod(n) for n = 65506199 and 65506208.

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, 102034 + ... + 102673.

It is an arithmetic number, because the mean of its divisors is an integer number (5570982).

Almost surely, 2^65506240 is an apocalyptic number.

It is an amenable number.

65506240 is an abundant number, since it is smaller than the sum of its proper divisors (90481256).

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

65506240 is a wasteful number, since it uses less digits than its factorization.

65506240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204724 (or 204714 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 65506240 is about 8093.5925274256. The cubic root of 65506240 is about 403.1136993006.

Adding to 65506240 its reverse (4260556), we get a palindrome (69766796).

The spelling of 65506240 in words is "sixty-five million, five hundred six thousand, two hundred forty".