1388663128 has 16 divisors (see below), whose sum is σ = 2659142880. Its totient is φ = 679558368.

The previous prime is 1388663119. The next prime is 1388663149. The reversal of 1388663128 is 8213668831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846251 + ... + 1847002.

It is an arithmetic number, because the mean of its divisors is an integer number (166196430).

Almost surely, 2^1388663128 is an apocalyptic number.

It is an amenable number.

1388663128 is a deficient number, since it is larger than the sum of its proper divisors (1270479752).

1388663128 is a wasteful number, since it uses less digits than its factorization.

1388663128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693306 (or 3693302 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 1388663128 is about 37264.7706017359. The cubic root of 1388663128 is about 1115.6611274834.

The spelling of 1388663128 in words is "one billion, three hundred eighty-eight million, six hundred sixty-three thousand, one hundred twenty-eight".