644341246 has 8 divisors (see below), whose sum is σ = 984748104. Its totient is φ = 316091880.

The previous prime is 644341237. The next prime is 644341249. The reversal of 644341246 is 642143446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644341249) 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, 3039240 + ... + 3039451.

It is an arithmetic number, because the mean of its divisors is an integer number (123093513).

Almost surely, 2^644341246 is an apocalyptic number.

644341246 is a deficient number, since it is larger than the sum of its proper divisors (340406858).

644341246 is a wasteful number, since it uses less digits than its factorization.

644341246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6078746.

The product of its digits is 55296, while the sum is 34.

The square root of 644341246 is about 25383.8776785581. The cubic root of 644341246 is about 863.7180140804.

The spelling of 644341246 in words is "six hundred forty-four million, three hundred forty-one thousand, two hundred forty-six".