1220312244 has 48 divisors (see below), whose sum is σ = 2941440768. Its totient is φ = 393464448.

The previous prime is 1220312237. The next prime is 1220312263. The reversal of 1220312244 is 4422130221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220312244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68869 + ... + 84755.

It is an arithmetic number, because the mean of its divisors is an integer number (61280016).

Almost surely, 2^1220312244 is an apocalyptic number.

It is an amenable number.

1220312244 is an abundant number, since it is smaller than the sum of its proper divisors (1721128524).

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

1220312244 is a wasteful number, since it uses less digits than its factorization.

1220312244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16104 (or 16102 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1220312244 is about 34932.9678670450. The cubic root of 1220312244 is about 1068.6208813886.

Adding to 1220312244 its reverse (4422130221), we get a palindrome (5642442465).

The spelling of 1220312244 in words is "one billion, two hundred twenty million, three hundred twelve thousand, two hundred forty-four".