1220344648 has 32 divisors (see below), whose sum is σ = 2313732960. Its totient is φ = 603383040.

The previous prime is 1220344637. The next prime is 1220344661. The reversal of 1220344648 is 8464430221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319840 + ... + 323632.

It is an arithmetic number, because the mean of its divisors is an integer number (72304155).

Almost surely, 2^1220344648 is an apocalyptic number.

It is an amenable number.

1220344648 is a deficient number, since it is larger than the sum of its proper divisors (1093388312).

1220344648 is a wasteful number, since it uses less digits than its factorization.

1220344648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 1220344648 is about 34933.4316665283. The cubic root of 1220344648 is about 1068.6303399745.

Adding to 1220344648 its reverse (8464430221), we get a palindrome (9684774869).

The spelling of 1220344648 in words is "one billion, two hundred twenty million, three hundred forty-four thousand, six hundred forty-eight".