1388888888878 has 32 divisors (see below), whose sum is σ = 2129700290400. Its totient is φ = 679116721536.

The previous prime is 1388888888861. The next prime is 1388888888879. The reversal of 1388888888878 is 8788888888831.

It is a junction number, because it is equal to n+sod(n) for n = 1388888888792 and 1388888888801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388888888879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32756500 + ... + 32798872.

It is an arithmetic number, because the mean of its divisors is an integer number (66553134075).

Almost surely, 2^{1388888888878} is an apocalyptic number.

1388888888878 is a deficient number, since it is larger than the sum of its proper divisors (740811401522).

1388888888878 is a wasteful number, since it uses less digits than its factorization.

1388888888878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43876.

The product of its digits is 22548578304, while the sum is 91.

The spelling of 1388888888878 in words is "one trillion, three hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred seventy-eight".