1240041552438 has 64 divisors (see below), whose sum is σ = 2826236593152. Its totient is φ = 359821714560.

The previous prime is 1240041552437. The next prime is 1240041552467. The reversal of 1240041552438 is 8342551400421.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1240041552396 and 1240041552405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240041552437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4740345 + ... + 4995092.

It is an arithmetic number, because the mean of its divisors is an integer number (44159946768).

Almost surely, 2^{1240041552438} is an apocalyptic number.

1240041552438 is an abundant number, since it is smaller than the sum of its proper divisors (1586195040714).

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

1240041552438 is a wasteful number, since it uses less digits than its factorization.

1240041552438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9735549.

The product of its (nonzero) digits is 153600, while the sum is 39.

Adding to 1240041552438 its reverse (8342551400421), we get a palindrome (9582592952859).

The spelling of 1240041552438 in words is "one trillion, two hundred forty billion, forty-one million, five hundred fifty-two thousand, four hundred thirty-eight".