1123345240 has 64 divisors (see below), whose sum is σ = 2590963200. Its totient is φ = 438202752.

The previous prime is 1123345217. The next prime is 1123345241. The reversal of 1123345240 is 425433211.

It is a super-3 number, since 3×1123345240³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123345241) 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, 260139 + ... + 264421.

It is an arithmetic number, because the mean of its divisors is an integer number (40483800).

Almost surely, 2^1123345240 is an apocalyptic number.

1123345240 is a gapful number since it is divisible by the number (10) 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 1123345240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295481600).

1123345240 is an abundant number, since it is smaller than the sum of its proper divisors (1467617960).

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

1123345240 is a wasteful number, since it uses less digits than its factorization.

1123345240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1123345240 is about 33516.3428792582. The cubic root of 1123345240 is about 1039.5317295235.

Adding to 1123345240 its reverse (425433211), we get a palindrome (1548778451).

The spelling of 1123345240 in words is "one billion, one hundred twenty-three million, three hundred forty-five thousand, two hundred forty".