64240444 has 24 divisors (see below), whose sum is σ = 119523600. Its totient is φ = 30124800.

The previous prime is 64240441. The next prime is 64240459. The reversal of 64240444 is 44404246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64240441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3492 + ... + 11860.

It is an arithmetic number, because the mean of its divisors is an integer number (4980150).

Almost surely, 2^64240444 is an apocalyptic number.

It is an amenable number.

64240444 is a deficient number, since it is larger than the sum of its proper divisors (55283156).

64240444 is a wasteful number, since it uses less digits than its factorization.

64240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8493 (or 8491 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 64240444 is about 8015.0136618723. The cubic root of 64240444 is about 400.5002989914.

The spelling of 64240444 in words is "sixty-four million, two hundred forty thousand, four hundred forty-four".