1240043406 has 32 divisors (see below), whose sum is σ = 2868542208. Its totient is φ = 350028480.

The previous prime is 1240043381. The next prime is 1240043423. The reversal of 1240043406 is 6043400421.

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 15 ways as a sum of consecutive naturals, for example, 174375 + ... + 181346.

It is an arithmetic number, because the mean of its divisors is an integer number (89641944).

Almost surely, 2^1240043406 is an apocalyptic number.

1240043406 is an abundant number, since it is smaller than the sum of its proper divisors (1628498802).

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

1240043406 is a wasteful number, since it uses less digits than its factorization.

1240043406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355816.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1240043406 is about 35214.2500417090. The cubic root of 1240043406 is about 1074.3496065080.

Adding to 1240043406 its reverse (6043400421), we get a palindrome (7283443827).

The spelling of 1240043406 in words is "one billion, two hundred forty million, forty-three thousand, four hundred six".