1144313220 has 48 divisors (see below), whose sum is σ = 3206226240. Its totient is φ = 304945536.

The previous prime is 1144313161. The next prime is 1144313221. The reversal of 1144313220 is 223134411.

It is not an unprimeable number, because it can be changed into a prime (1144313221) 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, 97846 + ... + 108914.

It is an arithmetic number, because the mean of its divisors is an integer number (66796380).

Almost surely, 2^1144313220 is an apocalyptic number.

1144313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144313220 is an abundant number, since it is smaller than the sum of its proper divisors (2061913020).

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

1144313220 is a wasteful number, since it uses less digits than its factorization.

1144313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12804 (or 12802 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1144313220 is about 33827.6990054009. The cubic root of 1144313220 is about 1045.9597479962.

Adding to 1144313220 its reverse (223134411), we get a palindrome (1367447631).

The spelling of 1144313220 in words is "one billion, one hundred forty-four million, three hundred thirteen thousand, two hundred twenty".