641944 has 16 divisors (see below), whose sum is σ = 1245600. Its totient is φ = 309792.

The previous prime is 641929. The next prime is 641959. The reversal of 641944 is 449146.

641944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (641929) and next prime (641959).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (77850).

2⁶⁴¹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

641944 is a deficient number, since it is larger than the sum of its proper divisors (603656).

641944 is a wasteful number, since it uses less digits than its factorization.

641944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802 (or 2798 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 641944 is about 801.2140787580. The cubic root of 641944 is about 86.2645540097.

The spelling of 641944 in words is "six hundred forty-one thousand, nine hundred forty-four".