1320200244 has 144 divisors (see below), whose sum is σ = 3715717824. Its totient is φ = 391910400.

The previous prime is 1320200243. The next prime is 1320200251. The reversal of 1320200244 is 4420020231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320200243) 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 47 ways as a sum of consecutive naturals, for example, 7293834 + ... + 7294014.

It is an arithmetic number, because the mean of its divisors is an integer number (25803596).

Almost surely, 2^1320200244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320200244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857858912).

1320200244 is an abundant number, since it is smaller than the sum of its proper divisors (2395517580).

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

1320200244 is a wasteful number, since it uses less digits than its factorization.

1320200244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1320200244 is about 36334.5599120176. The cubic root of 1320200244 is about 1097.0167773588.

Adding to 1320200244 its reverse (4420020231), we get a palindrome (5740220475).

The spelling of 1320200244 in words is "one billion, three hundred twenty million, two hundred thousand, two hundred forty-four".