65044480 has 64 divisors (see below), whose sum is σ = 156497580. Its totient is φ = 25952256.

The previous prime is 65044451. The next prime is 65044481. The reversal of 65044480 is 8444056.

It can be written as a sum of positive squares in 2 ways, for example, as 65028096 + 16384 = 8064^2 + 128^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (65044481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163642 + ... + 164038.

Almost surely, 2^65044480 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 65044480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78248790).

65044480 is an abundant number, since it is smaller than the sum of its proper divisors (91453100).

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

65044480 is an frugal number, since it uses more digits than its factorization.

65044480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 65044480 is about 8065.0158090360. The cubic root of 65044480 is about 402.1642687322.

The spelling of 65044480 in words is "sixty-five million, forty-four thousand, four hundred eighty".