1388889444444 has 48 divisors (see below), whose sum is σ = 3258479400960. Its totient is φ = 460430386560.

The previous prime is 1388889444433. The next prime is 1388889444497. The reversal of 1388889444444 is 4444449888831.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9930552 + ... + 10069440.

It is an arithmetic number, because the mean of its divisors is an integer number (67884987520).

Almost surely, 2^{1388889444444} is an apocalyptic number.

It is an amenable number.

1388889444444 is an abundant number, since it is smaller than the sum of its proper divisors (1869589956516).

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

1388889444444 is a wasteful number, since it uses less digits than its factorization.

1388889444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143450 (or 143448 counting only the distinct ones).

The product of its digits is 452984832, while the sum is 69.

It can be divided in two parts, 1388889 and 444444, that multiplied together give a palindrome (617283382716).

The spelling of 1388889444444 in words is "one trillion, three hundred eighty-eight billion, eight hundred eighty-nine million, four hundred forty-four thousand, four hundred forty-four".