1138388 has 12 divisors (see below), whose sum is σ = 2109492. Its totient is φ = 535680.

The previous prime is 1138369. The next prime is 1138391. The reversal of 1138388 is 8838311.

It can be written as a sum of positive squares in 2 ways, for example, as 1024144 + 114244 = 1012^2 + 338^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8303 + ... + 8438.

It is an arithmetic number, because the mean of its divisors is an integer number (175791).

2^1138388 is an apocalyptic number.

It is an amenable number.

1138388 is a deficient number, since it is larger than the sum of its proper divisors (971104).

1138388 is a wasteful number, since it uses less digits than its factorization.

1138388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16762 (or 16760 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 1138388 is about 1066.9526699906. The cubic root of 1138388 is about 104.4151306833.

The spelling of 1138388 in words is "one million, one hundred thirty-eight thousand, three hundred eighty-eight".