1220206716 has 36 divisors (see below), whose sum is σ = 3085537000. Its totient is φ = 406587168.

The previous prime is 1220206679. The next prime is 1220206721. The reversal of 1220206716 is 6176020221.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1220206716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143430 + ... + 151698.

Almost surely, 2^1220206716 is an apocalyptic number.

It is an amenable number.

1220206716 is an abundant number, since it is smaller than the sum of its proper divisors (1865330284).

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

1220206716 is a wasteful number, since it uses less digits than its factorization.

1220206716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12378 (or 12373 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1220206716 is about 34931.4573987402. The cubic root of 1220206716 is about 1068.5900770662.

Adding to 1220206716 its reverse (6176020221), we get a palindrome (7396226937).

It can be divided in two parts, 1220 and 206716, that added together give a square (207936 = 456²).

The spelling of 1220206716 in words is "one billion, two hundred twenty million, two hundred six thousand, seven hundred sixteen".