1123153044 has 72 divisors (see below), whose sum is σ = 2845910592. Its totient is φ = 344597760.

The previous prime is 1123153039. The next prime is 1123153049. The reversal of 1123153044 is 4403513211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1123153039) and next prime (1123153049).

It is a super-2 number, since 2×1123153044² = 2522945520492931872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123153049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1056057 + ... + 1057119.

It is an arithmetic number, because the mean of its divisors is an integer number (39526536).

Almost surely, 2^1123153044 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 1123153044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422955296).

1123153044 is an abundant number, since it is smaller than the sum of its proper divisors (1722757548).

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

1123153044 is a wasteful number, since it uses less digits than its factorization.

1123153044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1123153044 is about 33513.4755583482. The cubic root of 1123153044 is about 1039.4724407644.

Adding to 1123153044 its reverse (4403513211), we get a palindrome (5526666255).

The spelling of 1123153044 in words is "one billion, one hundred twenty-three million, one hundred fifty-three thousand, forty-four".