641828 has 24 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 281120.

The previous prime is 641827. The next prime is 641833. The reversal of 641828 is 828146.

641828 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 641828.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641828.

It is not an unprimeable number, because it can be changed into a prime (641821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 1527.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁶⁴¹⁸²⁸ is an apocalyptic number.

It is an amenable number.

641828 is a deficient number, since it is larger than the sum of its proper divisors (628252).

641828 is a wasteful number, since it uses less digits than its factorization.

641828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

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

The square root of 641828 is about 801.1416853466. The cubic root of 641828 is about 86.2593576629.

It can be divided in two parts, 6418 and 28, that added together give a palindrome (6446).

The spelling of 641828 in words is "six hundred forty-one thousand, eight hundred twenty-eight".