1388143884 has 24 divisors (see below), whose sum is σ = 3239779648. Its totient is φ = 462603600.

The previous prime is 1388143873. The next prime is 1388143903. The reversal of 1388143884 is 4883418831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49959 + ... + 72609.

Almost surely, 2^1388143884 is an apocalyptic number.

It is an amenable number.

1388143884 is an abundant number, since it is smaller than the sum of its proper divisors (1851635764).

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

1388143884 is a wasteful number, since it uses less digits than its factorization.

1388143884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27765 (or 27763 counting only the distinct ones).

The product of its digits is 589824, while the sum is 48.

The square root of 1388143884 is about 37257.8029948090. The cubic root of 1388143884 is about 1115.5220554619.

The spelling of 1388143884 in words is "one billion, three hundred eighty-eight million, one hundred forty-three thousand, eight hundred eighty-four".