65440284 has 96 divisors (see below), whose sum is σ = 191923200. Its totient is φ = 17244864.

The previous prime is 65440283. The next prime is 65440301. The reversal of 65440284 is 48204456.

65440284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65440283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52897 + ... + 54119.

It is an arithmetic number, because the mean of its divisors is an integer number (1999200).

Almost surely, 2^65440284 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 65440284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95961600).

65440284 is an abundant number, since it is smaller than the sum of its proper divisors (126482916).

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

65440284 is a wasteful number, since it uses less digits than its factorization.

65440284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 65440284 is about 8089.5169200639. The cubic root of 65440284 is about 402.9783600536.

The spelling of 65440284 in words is "sixty-five million, four hundred forty thousand, two hundred eighty-four".