1123431232 has 168 divisors, whose sum is σ = 2929188960. Its totient is φ = 422231040.

The previous prime is 1123431229. The next prime is 1123431233. The reversal of 1123431232 is 2321343211.

It is a super-3 number, since 3×1123431232³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123431233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 999823 + ... + 1000945.

Almost surely, 2^1123431232 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 1123431232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464594480).

1123431232 is an abundant number, since it is smaller than the sum of its proper divisors (1805757728).

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

1123431232 is a wasteful number, since it uses less digits than its factorization.

1123431232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1172 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1123431232 is about 33517.6256915671. The cubic root of 1123431232 is about 1039.5582542072.

Adding to 1123431232 its reverse (2321343211), we get a palindrome (3444774443).

The spelling of 1123431232 in words is "one billion, one hundred twenty-three million, four hundred thirty-one thousand, two hundred thirty-two".