1240055340 has 24 divisors (see below), whose sum is σ = 3472155120. Its totient is φ = 330681408.

The previous prime is 1240055321. The next prime is 1240055347. The reversal of 1240055340 is 435500421.

It is a self number, because there is not a number n which added to its sum of digits gives 1240055340.

It is not an unprimeable number, because it can be changed into a prime (1240055347) by changing a digit.

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, 10333735 + ... + 10333854.

It is an arithmetic number, because the mean of its divisors is an integer number (144673130).

Almost surely, 2^1240055340 is an apocalyptic number.

1240055340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240055340 is an abundant number, since it is smaller than the sum of its proper divisors (2232099780).

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

1240055340 is a wasteful number, since it uses less digits than its factorization.

1240055340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20667601 (or 20667599 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1240055340 is about 35214.4194897488. The cubic root of 1240055340 is about 1074.3530529591.

Adding to 1240055340 its reverse (435500421), we get a palindrome (1675555761).

The spelling of 1240055340 in words is "one billion, two hundred forty million, fifty-five thousand, three hundred forty".