900209444 has 6 divisors (see below), whose sum is σ = 1575366534. Its totient is φ = 450104720.

The previous prime is 900209441. The next prime is 900209459. The reversal of 900209444 is 444902009.

It can be written as a sum of positive squares in only one way, i.e., 893292544 + 6916900 = 29888^2 + 2630^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 900209444.

It is not an unprimeable number, because it can be changed into a prime (900209441) 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 as a sum of consecutive naturals, namely, 112526177 + ... + 112526184.

It is an arithmetic number, because the mean of its divisors is an integer number (262561089).

Almost surely, 2^900209444 is an apocalyptic number.

It is an amenable number.

900209444 is a deficient number, since it is larger than the sum of its proper divisors (675157090).

900209444 is a wasteful number, since it uses less digits than its factorization.

900209444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225052365 (or 225052363 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 900209444 is about 30003.4905302700. The cubic root of 900209444 is about 965.5642735962.

The spelling of 900209444 in words is "nine hundred million, two hundred nine thousand, four hundred forty-four".