1388216 has 16 divisors (see below), whose sum is σ = 2740200. Its totient is φ = 657504.

The previous prime is 1388183. The next prime is 1388227. The reversal of 1388216 is 6128831.

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, 4415 + ... + 4718.

2^1388216 is an apocalyptic number.

It is an amenable number.

1388216 is a deficient number, since it is larger than the sum of its proper divisors (1351984).

1388216 is a wasteful number, since it uses less digits than its factorization.

1388216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9158 (or 9154 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1388216 is about 1178.2257848138. The cubic root of 1388216 is about 111.5541372767.

The spelling of 1388216 in words is "one million, three hundred eighty-eight thousand, two hundred sixteen".