1123340240 has 80 divisors (see below), whose sum is σ = 2973131136. Its totient is φ = 390720000.

The previous prime is 1123340237. The next prime is 1123340303. The reversal of 1123340240 is 420433211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 7511 + ... + 47990.

Almost surely, 2^1123340240 is an apocalyptic number.

1123340240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123340240 is an abundant number, since it is smaller than the sum of its proper divisors (1849790896).

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

1123340240 is a wasteful number, since it uses less digits than its factorization.

1123340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55548 (or 55542 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1123340240 is about 33516.2682886983. The cubic root of 1123340240 is about 1039.5301872056.

Adding to 1123340240 its reverse (420433211), we get a palindrome (1543773451).

The spelling of 1123340240 in words is "one billion, one hundred twenty-three million, three hundred forty thousand, two hundred forty".