1388673888 has 96 divisors (see below), whose sum is σ = 4172281344. Its totient is φ = 396168192.

The previous prime is 1388673887. The next prime is 1388673911. The reversal of 1388673888 is 8883768831.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388673887) 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, 648756 + ... + 650892.

It is an arithmetic number, because the mean of its divisors is an integer number (43461264).

Almost surely, 2^1388673888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388673888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2086140672).

1388673888 is an abundant number, since it is smaller than the sum of its proper divisors (2783607456).

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

1388673888 is a wasteful number, since it uses less digits than its factorization.

1388673888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124 (or 3116 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 60.

The square root of 1388673888 is about 37264.9149737390. The cubic root of 1388673888 is about 1115.6640090276.

The spelling of 1388673888 in words is "one billion, three hundred eighty-eight million, six hundred seventy-three thousand, eight hundred eighty-eight".