65238140 has 48 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 23484480.

The previous prime is 65238133. The next prime is 65238169. The reversal of 65238140 is 4183256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21221 + ... + 24099.

It is an arithmetic number, because the mean of its divisors is an integer number (3144960).

Almost surely, 2^65238140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65238140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75479040).

65238140 is an abundant number, since it is smaller than the sum of its proper divisors (85719940).

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

65238140 is a wasteful number, since it uses less digits than its factorization.

65238140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002 (or 3000 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 65238140 is about 8077.0130617698. The cubic root of 65238140 is about 402.5630008247.

The spelling of 65238140 in words is "sixty-five million, two hundred thirty-eight thousand, one hundred forty".