641884 has 12 divisors (see below), whose sum is σ = 1172304. Its totient is φ = 306944.

The previous prime is 641881. The next prime is 641891. The reversal of 641884 is 488146.

It is a plaindrome in base 14.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3397 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (97692).

2⁶⁴¹⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

641884 is a deficient number, since it is larger than the sum of its proper divisors (530420).

641884 is a wasteful number, since it uses less digits than its factorization.

641884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004 (or 7002 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 641884 is about 801.1766347067. The cubic root of 641884 is about 86.2618663223.

The spelling of 641884 in words is "six hundred forty-one thousand, eight hundred eighty-four".