64440284 has 12 divisors (see below), whose sum is σ = 113769264. Its totient is φ = 31934784.

The previous prime is 64440283. The next prime is 64440293. The reversal of 64440284 is 48204446.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64440284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64440281) 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 3 ways as a sum of consecutive naturals, for example, 70832 + ... + 71735.

It is an arithmetic number, because the mean of its divisors is an integer number (9480772).

Almost surely, 2^64440284 is an apocalyptic number.

It is an amenable number.

64440284 is a deficient number, since it is larger than the sum of its proper divisors (49328980).

64440284 is a wasteful number, since it uses less digits than its factorization.

64440284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142684 (or 142682 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 64440284 is about 8027.4705854335. The cubic root of 64440284 is about 400.9151629286.

The spelling of 64440284 in words is "sixty-four million, four hundred forty thousand, two hundred eighty-four".