644352014 has 8 divisors (see below), whose sum is σ = 973481880. Its totient is φ = 319858056.

The previous prime is 644352013. The next prime is 644352029. The reversal of 644352014 is 410253446.

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 (644352013) 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, 1158629 + ... + 1159184.

It is an arithmetic number, because the mean of its divisors is an integer number (121685235).

Almost surely, 2^644352014 is an apocalyptic number.

644352014 is a deficient number, since it is larger than the sum of its proper divisors (329129866).

644352014 is a wasteful number, since it uses less digits than its factorization.

644352014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317954.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 644352014 is about 25384.0897808056. The cubic root of 644352014 is about 863.7228254355.

The spelling of 644352014 in words is "six hundred forty-four million, three hundred fifty-two thousand, fourteen".