1388518142 has 48 divisors (see below), whose sum is σ = 2390154480. Its totient is φ = 599913600.

The previous prime is 1388518127. The next prime is 1388518147. The reversal of 1388518142 is 2418158831.

It is a self number, because there is not a number n which added to its sum of digits gives 1388518142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388518147) 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 23 ways as a sum of consecutive naturals, for example, 2664842 + ... + 2665362.

It is an arithmetic number, because the mean of its divisors is an integer number (49794885).

Almost surely, 2^1388518142 is an apocalyptic number.

1388518142 is a deficient number, since it is larger than the sum of its proper divisors (1001636338).

1388518142 is a wasteful number, since it uses less digits than its factorization.

1388518142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 786 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 1388518142 is about 37262.8252015330. The cubic root of 1388518142 is about 1115.6222985620.

The spelling of 1388518142 in words is "one billion, three hundred eighty-eight million, five hundred eighteen thousand, one hundred forty-two".