65489472 has 84 divisors (see below), whose sum is σ = 194712336. Its totient is φ = 21824640.

The previous prime is 65489449. The next prime is 65489483. The reversal of 65489472 is 27498456.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13447 + ... + 17657.

It is an arithmetic number, because the mean of its divisors is an integer number (2318004).

Almost surely, 2^65489472 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 65489472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97356168).

65489472 is an abundant number, since it is smaller than the sum of its proper divisors (129222864).

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

65489472 is an equidigital number, since it uses as much as digits as its factorization.

65489472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238 (or 4216 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 65489472 is about 8092.5565799690. The cubic root of 65489472 is about 403.0793006065.

The spelling of 65489472 in words is "sixty-five million, four hundred eighty-nine thousand, four hundred seventy-two".