1388128 has 24 divisors (see below), whose sum is σ = 3123792. Its totient is φ = 594816.

The previous prime is 1388117. The next prime is 1388141. The reversal of 1388128 is 8218831.

It is a self number, because there is not a number n which added to its sum of digits gives 1388128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875 + ... + 3322.

It is an arithmetic number, because the mean of its divisors is an integer number (130158).

2^1388128 is an apocalyptic number.

It is an amenable number.

1388128 is an abundant number, since it is smaller than the sum of its proper divisors (1735664).

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

1388128 is an equidigital number, since it uses as much as digits as its factorization.

1388128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6214 (or 6206 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 1388128 is about 1178.1884399365. The cubic root of 1388128 is about 111.5517800615.

It can be divided in two parts, 1 and 388128, that added together give a square (388129 = 623²).

The spelling of 1388128 in words is "one million, three hundred eighty-eight thousand, one hundred twenty-eight".