1133220144 has 80 divisors (see below), whose sum is σ = 3352999680. Its totient is φ = 323070720.

The previous prime is 1133220107. The next prime is 1133220163. The reversal of 1133220144 is 4410223311.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1133220144.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161542 + ... + 168410.

It is an arithmetic number, because the mean of its divisors is an integer number (41912496).

Almost surely, 2^1133220144 is an apocalyptic number.

1133220144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1133220144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676499840).

1133220144 is an abundant number, since it is smaller than the sum of its proper divisors (2219779536).

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

1133220144 is a wasteful number, since it uses less digits than its factorization.

1133220144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378 (or 7372 counting only the distinct ones).

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

The square root of 1133220144 is about 33663.3353071261. The cubic root of 1133220144 is about 1042.5688910072.

Adding to 1133220144 its reverse (4410223311), we get a palindrome (5543443455).

The spelling of 1133220144 in words is "one billion, one hundred thirty-three million, two hundred twenty thousand, one hundred forty-four".