644114 has 4 divisors (see below), whose sum is σ = 966174. Its totient is φ = 322056.

The previous prime is 644107. The next prime is 644117. The reversal of 644114 is 411446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 27889 = 785^2 + 167^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 644114.

It is not an unprimeable number, because it can be changed into a prime (644117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161027 + ... + 161030.

2⁶⁴⁴¹¹⁴ is an apocalyptic number.

644114 is a deficient number, since it is larger than the sum of its proper divisors (322060).

644114 is a wasteful number, since it uses less digits than its factorization.

644114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322059.

The product of its digits is 384, while the sum is 20.

The square root of 644114 is about 802.5671311485. The cubic root of 644114 is about 86.3616463572.

The spelling of 644114 in words is "six hundred forty-four thousand, one hundred fourteen".