1220660144 has 40 divisors (see below), whose sum is σ = 2605614480. Its totient is φ = 549344000.

The previous prime is 1220660137. The next prime is 1220660179. The reversal of 1220660144 is 4410660221.

It is a super-2 number, since 2×1220660144² = 2980022374300201472, which contains 22 as substring.

It is an unprimeable number.

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, 16559 + ... + 52110.

It is an arithmetic number, because the mean of its divisors is an integer number (65140362).

Almost surely, 2^1220660144 is an apocalyptic number.

It is an amenable number.

1220660144 is an abundant number, since it is smaller than the sum of its proper divisors (1384954336).

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

1220660144 is a wasteful number, since it uses less digits than its factorization.

1220660144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68789 (or 68783 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1220660144 is about 34937.9470490182. The cubic root of 1220660144 is about 1068.7224231271.

The spelling of 1220660144 in words is "one billion, two hundred twenty million, six hundred sixty thousand, one hundred forty-four".