641288 has 16 divisors (see below), whose sum is σ = 1266000. Its totient is φ = 303696.

The previous prime is 641287. The next prime is 641299. The reversal of 641288 is 882146.

It is a super-2 number, since 2×641288² = 822500597888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641288.

It is not an unprimeable number, because it can be changed into a prime (641287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (79125).

2⁶⁴¹²⁸⁸ is an apocalyptic number.

It is an amenable number.

641288 is a deficient number, since it is larger than the sum of its proper divisors (624712).

641288 is a wasteful number, since it uses less digits than its factorization.

641288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4240 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 641288 is about 800.8045953914. The cubic root of 641288 is about 86.2351595274.

It can be divided in two parts, 641 and 288, that added together give a palindrome (929).

The spelling of 641288 in words is "six hundred forty-one thousand, two hundred eighty-eight".