1220244144 has 80 divisors (see below), whose sum is σ = 3792257280. Its totient is φ = 330289920.

The previous prime is 1220244131. The next prime is 1220244149. The reversal of 1220244144 is 4414420221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1220244149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89187 + ... + 101954.

It is an arithmetic number, because the mean of its divisors is an integer number (47403216).

Almost surely, 2^1220244144 is an apocalyptic number.

1220244144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220244144 is an abundant number, since it is smaller than the sum of its proper divisors (2572013136).

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

1220244144 is a wasteful number, since it uses less digits than its factorization.

1220244144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191178 (or 191172 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1220244144 is about 34931.9931295081. The cubic root of 1220244144 is about 1068.6010027506.

Adding to 1220244144 its reverse (4414420221), we get a palindrome (5634664365).

The spelling of 1220244144 in words is "one billion, two hundred twenty million, two hundred forty-four thousand, one hundred forty-four".