1200611720 has 192 divisors, whose sum is σ = 3457209600. Its totient is φ = 371051520.

The previous prime is 1200611719. The next prime is 1200611747. The reversal of 1200611720 is 271160021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1200611692 and 1200611701.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5023361 + ... + 5023599.

It is an arithmetic number, because the mean of its divisors is an integer number (18006300).

Almost surely, 2^1200611720 is an apocalyptic number.

1200611720 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 1200611720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728604800).

1200611720 is an abundant number, since it is smaller than the sum of its proper divisors (2256597880).

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

1200611720 is a wasteful number, since it uses less digits than its factorization.

1200611720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1200611720 is about 34649.8444440953. The cubic root of 1200611720 is about 1062.8391078141.

Adding to 1200611720 its reverse (271160021), we get a palindrome (1471771741).

The spelling of 1200611720 in words is "one billion, two hundred million, six hundred eleven thousand, seven hundred twenty".