1388256875 has 20 divisors (see below), whose sum is σ = 1744597800. Its totient is φ = 1104312000.

The previous prime is 1388256851. The next prime is 1388256887. The reversal of 1388256875 is 5786528831.

It is not a de Polignac number, because 1388256875 - 2⁶ = 1388256811 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105671 + ... + 118079.

It is an arithmetic number, because the mean of its divisors is an integer number (87229890).

Almost surely, 2^1388256875 is an apocalyptic number.

1388256875 is a deficient number, since it is larger than the sum of its proper divisors (356340925).

1388256875 is an equidigital number, since it uses as much as digits as its factorization.

1388256875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12608 (or 12593 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 53.

The square root of 1388256875 is about 37259.3193040345. The cubic root of 1388256875 is about 1115.5523214246.

The spelling of 1388256875 in words is "one billion, three hundred eighty-eight million, two hundred fifty-six thousand, eight hundred seventy-five".