900444 has 12 divisors (see below), whose sum is σ = 2101064. Its totient is φ = 300144.

The previous prime is 900443. The next prime is 900461. The reversal of 900444 is 444009.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 900444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37507 + ... + 37530.

2⁹⁰⁰⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

900444 is an abundant number, since it is smaller than the sum of its proper divisors (1200620).

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

900444 is a wasteful number, since it uses less digits than its factorization.

900444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75044 (or 75042 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 900444 is about 948.9172777434. The cubic root of 900444 is about 96.5648127870.

The spelling of 900444 in words is "nine hundred thousand, four hundred forty-four".