1123445240 has 32 divisors (see below), whose sum is σ = 2575450080. Its totient is φ = 440898432.

The previous prime is 1123445231. The next prime is 1123445251. The reversal of 1123445240 is 425443211.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262844 + ... + 267083.

It is an arithmetic number, because the mean of its divisors is an integer number (80482815).

Almost surely, 2^1123445240 is an apocalyptic number.

1123445240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123445240 is an abundant number, since it is smaller than the sum of its proper divisors (1452004840).

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

1123445240 is a wasteful number, since it uses less digits than its factorization.

1123445240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529991 (or 529987 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1123445240 is about 33517.8346555979. The cubic root of 1123445240 is about 1039.5625749201.

Adding to 1123445240 its reverse (425443211), we get a palindrome (1548888451).

The spelling of 1123445240 in words is "one billion, one hundred twenty-three million, four hundred forty-five thousand, two hundred forty".