65238516 has 144 divisors (see below), whose sum is σ = 199180800. Its totient is φ = 17611776.

The previous prime is 65238461. The next prime is 65238517. The reversal of 65238516 is 61583256.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65238517) 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 47 ways as a sum of consecutive naturals, for example, 577276 + ... + 577388.

It is an arithmetic number, because the mean of its divisors is an integer number (1383200).

Almost surely, 2^65238516 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 65238516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99590400).

65238516 is an abundant number, since it is smaller than the sum of its proper divisors (133942284).

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

65238516 is a wasteful number, since it uses less digits than its factorization.

65238516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 233 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 65238516 is about 8077.0363376674. The cubic root of 65238516 is about 402.5637742138.

65238516 divided by its sum of digits (36) gives a palindrome (1812181).

The spelling of 65238516 in words is "sixty-five million, two hundred thirty-eight thousand, five hundred sixteen".