1220308345 has 8 divisors (see below), whose sum is σ = 1541442240. Its totient is φ = 924865200.

The previous prime is 1220308343. The next prime is 1220308391. The reversal of 1220308345 is 5438030221.

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

It is not a de Polignac number, because 1220308345 - 2¹ = 1220308343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220308343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6422581 + ... + 6422770.

It is an arithmetic number, because the mean of its divisors is an integer number (192680280).

Almost surely, 2^1220308345 is an apocalyptic number.

It is an amenable number.

1220308345 is a deficient number, since it is larger than the sum of its proper divisors (321133895).

1220308345 is a wasteful number, since it uses less digits than its factorization.

1220308345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12845375.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1220308345 is about 34932.9120601189. The cubic root of 1220308345 is about 1068.6197432762.

Adding to 1220308345 its reverse (5438030221), we get a palindrome (6658338566).

The spelling of 1220308345 in words is "one billion, two hundred twenty million, three hundred eight thousand, three hundred forty-five".