1200320000 has 300 divisors, whose sum is σ = 3400386528. Its totient is φ = 422400000.

The previous prime is 1200319993. The next prime is 1200320027. The reversal of 1200320000 is 230021.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1200320000.

It is a congruent number.

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 38719985 + ... + 38720015.

Almost surely, 2^1200320000 is an apocalyptic number.

1200320000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1700193264).

1200320000 is an abundant number, since it is smaller than the sum of its proper divisors (2200066528).

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

1200320000 is an frugal number, since it uses more digits than its factorization.

1200320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1200320000 is about 34645.6346456520. The cubic root of 1200320000 is about 1062.7530193270.

Adding to 1200320000 its reverse (230021), we get a palindrome (1200550021).

The spelling of 1200320000 in words is "one billion, two hundred million, three hundred twenty thousand".