1220200306 has 8 divisors (see below), whose sum is σ = 1971092844. Its totient is φ = 563169360.

The previous prime is 1220200297. The next prime is 1220200307. The reversal of 1220200306 is 6030020221.

It can be written as a sum of positive squares in 2 ways, for example, as 1179304281 + 40896025 = 34341^2 + 6395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1220200306.

It is not an unprimeable number, because it can be changed into a prime (1220200307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23465365 + ... + 23465416.

Almost surely, 2^1220200306 is an apocalyptic number.

1220200306 is a deficient number, since it is larger than the sum of its proper divisors (750892538).

1220200306 is a wasteful number, since it uses less digits than its factorization.

1220200306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46930796.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220200306 is about 34931.3656475094. The cubic root of 1220200306 is about 1068.5882058875.

Adding to 1220200306 its reverse (6030020221), we get a palindrome (7250220527).

The spelling of 1220200306 in words is "one billion, two hundred twenty million, two hundred thousand, three hundred six".