1240080540 has 48 divisors (see below), whose sum is σ = 3475318560. Its totient is φ = 330393600.

The previous prime is 1240080511. The next prime is 1240080557. The reversal of 1240080540 is 450800421.

It is a self number, because there is not a number n which added to its sum of digits gives 1240080540.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 63456 + ... + 80664.

It is an arithmetic number, because the mean of its divisors is an integer number (72402470).

Almost surely, 2^1240080540 is an apocalyptic number.

1240080540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240080540 is an abundant number, since it is smaller than the sum of its proper divisors (2235238020).

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

1240080540 is a wasteful number, since it uses less digits than its factorization.

1240080540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18422 (or 18420 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1240080540 is about 35214.7772959024. Note that the first 3 decimals coincide. The cubic root of 1240080540 is about 1074.3603304606.

Adding to 1240080540 its reverse (450800421), we get a palindrome (1690880961).

The spelling of 1240080540 in words is "one billion, two hundred forty million, eighty thousand, five hundred forty".