100444 has 6 divisors (see below), whose sum is σ = 175784. Its totient is φ = 50220.

The previous prime is 100417. The next prime is 100447. The reversal of 100444 is 444001.

It is a happy number.

100444 is a modest number, since divided by 444 gives 100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100447) 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 as a sum of consecutive naturals, namely, 12552 + ... + 12559.

2¹⁰⁰⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

100444 is a deficient number, since it is larger than the sum of its proper divisors (75340).

100444 is a wasteful number, since it uses less digits than its factorization.

100444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25115 (or 25113 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 100444 is about 316.9290141341. The cubic root of 100444 is about 46.4844824315.

Adding to 100444 its reverse (444001), we get a palindrome (544445).

The spelling of 100444 in words is "one hundred thousand, four hundred forty-four", and thus it is an iban number.