1388888888740 has 48 divisors (see below), whose sum is σ = 2979001960704. Its totient is φ = 543684377600.

The previous prime is 1388888888731. The next prime is 1388888888741. The reversal of 1388888888740 is 478888888831.

It is not an unprimeable number, because it can be changed into a prime (1388888888741) 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 15 ways as a sum of consecutive naturals, for example, 10916895 + ... + 11043385.

It is an arithmetic number, because the mean of its divisors is an integer number (62062540848).

Almost surely, 2^{1388888888740} is an apocalyptic number.

1388888888740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388888888740 is an abundant number, since it is smaller than the sum of its proper divisors (1590113071964).

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

1388888888740 is a wasteful number, since it uses less digits than its factorization.

1388888888740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138228 (or 138226 counting only the distinct ones).

The product of its (nonzero) digits is 1409286144, while the sum is 79.

Subtracting from 1388888888740 its reverse (478888888831), we obtain a palindrome (909999999909).

The spelling of 1388888888740 in words is "one trillion, three hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, seven hundred forty".