641436 has 12 divisors (see below), whose sum is σ = 1496712. Its totient is φ = 213808.

The previous prime is 641419. The next prime is 641437. The reversal of 641436 is 634146.

641436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×641436² = 822880284192, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641437) by changing a digit.

641436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26715 + ... + 26738.

It is an arithmetic number, because the mean of its divisors is an integer number (124726).

2⁶⁴¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

641436 is an abundant number, since it is smaller than the sum of its proper divisors (855276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641436 is a wasteful number, since it uses less digits than its factorization.

641436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53460 (or 53458 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 641436 is about 800.8969971226. The cubic root of 641436 is about 86.2417929599.

The spelling of 641436 in words is "six hundred forty-one thousand, four hundred thirty-six".