1388242840243 has 24 divisors (see below), whose sum is σ = 1648513298432. Its totient is φ = 1145146820832.

The previous prime is 1388242840241. The next prime is 1388242840249. The reversal of 1388242840243 is 3420482428831.

It is not a de Polignac number, because 1388242840243 - 2¹ = 1388242840241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388242840241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1423246 + ... + 2191372.

Almost surely, 2^{1388242840243} is an apocalyptic number.

1388242840243 is a deficient number, since it is larger than the sum of its proper divisors (260270458189).

1388242840243 is an equidigital number, since it uses as much as digits as its factorization.

1388242840243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768499 (or 768470 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 49.

The spelling of 1388242840243 in words is "one trillion, three hundred eighty-eight billion, two hundred forty-two million, eight hundred forty thousand, two hundred forty-three".