1444131220 has 24 divisors (see below), whose sum is σ = 3465915264. Its totient is φ = 495130656.

The previous prime is 1444131197. The next prime is 1444131281. The reversal of 1444131220 is 221314441.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1444131191 and 1444131200.

It is a congruent number.

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, 5157472 + ... + 5157751.

It is an arithmetic number, because the mean of its divisors is an integer number (144413136).

Almost surely, 2^1444131220 is an apocalyptic number.

1444131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444131220 is an abundant number, since it is smaller than the sum of its proper divisors (2021784044).

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

1444131220 is a wasteful number, since it uses less digits than its factorization.

1444131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10315239 (or 10315237 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1444131220 is about 38001.7265397245. The cubic root of 1444131220 is about 1130.3220999451.

Adding to 1444131220 its reverse (221314441), we get a palindrome (1665445661).

The spelling of 1444131220 in words is "one billion, four hundred forty-four million, one hundred thirty-one thousand, two hundred twenty".