1220776208 has 20 divisors (see below), whose sum is σ = 2366461260. Its totient is φ = 610076544.

The previous prime is 1220776181. The next prime is 1220776213. The reversal of 1220776208 is 8026770221.

It can be written as a sum of positive squares in 2 ways, for example, as 641507584 + 579268624 = 25328^2 + 24068^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14666 + ... + 51542.

It is an arithmetic number, because the mean of its divisors is an integer number (118323063).

Almost surely, 2^1220776208 is an apocalyptic number.

It is an amenable number.

1220776208 is a deficient number, since it is larger than the sum of its proper divisors (1145685052).

1220776208 is a wasteful number, since it uses less digits than its factorization.

1220776208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38954 (or 38948 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 1220776208 is about 34939.6080115390. The cubic root of 1220776208 is about 1068.7562944900.

The spelling of 1220776208 in words is "one billion, two hundred twenty million, seven hundred seventy-six thousand, two hundred eight".