65840136 has 32 divisors (see below), whose sum is σ = 164799360. Its totient is φ = 21920192.

The previous prime is 65840123. The next prime is 65840143. The reversal of 65840136 is 63104856.

It is a junction number, because it is equal to n+sod(n) for n = 65840097 and 65840106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37126 + ... + 38858.

It is an arithmetic number, because the mean of its divisors is an integer number (5149980).

Almost surely, 2^65840136 is an apocalyptic number.

It is an amenable number.

65840136 is an abundant number, since it is smaller than the sum of its proper divisors (98959224).

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

65840136 is a wasteful number, since it uses less digits than its factorization.

65840136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 65840136 is about 8114.1934904216. The cubic root of 65840136 is about 403.7974509947.

Subtracting from 65840136 its product of nonzero digits (17280), we obtain a palindrome (65822856).

The spelling of 65840136 in words is "sixty-five million, eight hundred forty thousand, one hundred thirty-six".