1220445206 has 16 divisors (see below), whose sum is σ = 1840155408. Its totient is φ = 607068000.

The previous prime is 1220445139. The next prime is 1220445209. The reversal of 1220445206 is 6025440221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220445209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409301 + ... + 412271.

It is an arithmetic number, because the mean of its divisors is an integer number (115009713).

Almost surely, 2^1220445206 is an apocalyptic number.

1220445206 is a deficient number, since it is larger than the sum of its proper divisors (619710202).

1220445206 is a wasteful number, since it uses less digits than its factorization.

1220445206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1220445206 is about 34934.8709171796. The cubic root of 1220445206 is about 1068.6596913489.

Adding to 1220445206 its reverse (6025440221), we get a palindrome (7245885427).

The spelling of 1220445206 in words is "one billion, two hundred twenty million, four hundred forty-five thousand, two hundred six".