65140244 has 24 divisors (see below), whose sum is σ = 123003720. Its totient is φ = 30006144.

The previous prime is 65140241. The next prime is 65140247. The reversal of 65140244 is 44204156.

It is an interprime number because it is at equal distance from previous prime (65140241) and next prime (65140247).

It can be written as a sum of positive squares in 4 ways, for example, as 7562500 + 57577744 = 2750^2 + 7588^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37262 + ... + 38970.

It is an arithmetic number, because the mean of its divisors is an integer number (5125155).

Almost surely, 2^65140244 is an apocalyptic number.

It is an amenable number.

65140244 is a deficient number, since it is larger than the sum of its proper divisors (57863476).

65140244 is a wasteful number, since it uses less digits than its factorization.

65140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459 (or 2457 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 65140244 is about 8070.9506255459. The cubic root of 65140244 is about 402.3615387329.

The spelling of 65140244 in words is "sixty-five million, one hundred forty thousand, two hundred forty-four".