1118223144 has 160 divisors (see below), whose sum is σ = 3358998720. Its totient is φ = 346305024.

The previous prime is 1118223143. The next prime is 1118223157. The reversal of 1118223144 is 4413228111.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1118223143) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 913717 + ... + 914939.

It is an arithmetic number, because the mean of its divisors is an integer number (20993742).

Almost surely, 2^1118223144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118223144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679499360).

1118223144 is an abundant number, since it is smaller than the sum of its proper divisors (2240775576).

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

1118223144 is a wasteful number, since it uses less digits than its factorization.

1118223144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1328 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1118223144 is about 33439.8436599216. The cubic root of 1118223144 is about 1037.9493443154.

The spelling of 1118223144 in words is "one billion, one hundred eighteen million, two hundred twenty-three thousand, one hundred forty-four".