65238144 has 32 divisors (see below), whose sum is σ = 173289840. Its totient is φ = 21745920.

The previous prime is 65238133. The next prime is 65238169. The reversal of 65238144 is 44183256.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84562 + ... + 85329.

Almost surely, 2^65238144 is an apocalyptic number.

65238144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65238144 is an abundant number, since it is smaller than the sum of its proper divisors (108051696).

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

65238144 is a wasteful number, since it uses less digits than its factorization.

65238144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169908 (or 169896 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 65238144 is about 8077.0133093861. The cubic root of 65238144 is about 402.5630090522.

The spelling of 65238144 in words is "sixty-five million, two hundred thirty-eight thousand, one hundred forty-four".