1144563220 has 24 divisors (see below), whose sum is σ = 2425638600. Its totient is φ = 453624192.

The previous prime is 1144563197. The next prime is 1144563221. The reversal of 1144563220 is 223654411.

It can be written as a sum of positive squares in 4 ways, for example, as 87272964 + 1057290256 = 9342^2 + 32516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144563221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260335 + ... + 264694.

It is an arithmetic number, because the mean of its divisors is an integer number (101068275).

Almost surely, 2^1144563220 is an apocalyptic number.

1144563220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144563220 is an abundant number, since it is smaller than the sum of its proper divisors (1281075380).

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

1144563220 is a wasteful number, since it uses less digits than its factorization.

1144563220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525147 (or 525145 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1144563220 is about 33831.3940002478. The cubic root of 1144563220 is about 1046.0359133013.

The spelling of 1144563220 in words is "one billion, one hundred forty-four million, five hundred sixty-three thousand, two hundred twenty".