65140988 has 24 divisors (see below), whose sum is σ = 124569984. Its totient is φ = 29559600.

The previous prime is 65140981. The next prime is 65141003. The reversal of 65140988 is 88904156.

It is a super-2 number, since 2×65140988² = 8486696635232288, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41783 + ... + 43313.

It is an arithmetic number, because the mean of its divisors is an integer number (5190416).

Almost surely, 2^65140988 is an apocalyptic number.

It is an amenable number.

65140988 is a deficient number, since it is larger than the sum of its proper divisors (59428996).

65140988 is a wasteful number, since it uses less digits than its factorization.

65140988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513 (or 2511 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 65140988 is about 8070.9967166392. The cubic root of 65140988 is about 402.3630705860.

The spelling of 65140988 in words is "sixty-five million, one hundred forty thousand, nine hundred eighty-eight".