1388271238 has 32 divisors (see below), whose sum is σ = 2286610560. Its totient is φ = 629207040.

The previous prime is 1388271173. The next prime is 1388271251. The reversal of 1388271238 is 8321728831.

It is a junction number, because it is equal to n+sod(n) for n = 1388271194 and 1388271203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454998 + ... + 458038.

It is an arithmetic number, because the mean of its divisors is an integer number (71456580).

Almost surely, 2^1388271238 is an apocalyptic number.

1388271238 is a deficient number, since it is larger than the sum of its proper divisors (898339322).

1388271238 is a wasteful number, since it uses less digits than its factorization.

1388271238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552.

The product of its digits is 129024, while the sum is 43.

The square root of 1388271238 is about 37259.5120472612. The cubic root of 1388271238 is about 1115.5561686047.

It can be divided in two parts, 138 and 8271238, that added together give a square (8271376 = 2876²).

The spelling of 1388271238 in words is "one billion, three hundred eighty-eight million, two hundred seventy-one thousand, two hundred thirty-eight".