1388444 has 12 divisors (see below), whose sum is σ = 2557800. Its totient is φ = 657648.

The previous prime is 1388419. The next prime is 1388449. The reversal of 1388444 is 4448831.

It is a super-2 number, since 2×1388444² = 3855553482272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1388444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9059 + ... + 9210.

It is an arithmetic number, because the mean of its divisors is an integer number (213150).

2^1388444 is an apocalyptic number.

It is an amenable number.

1388444 is a deficient number, since it is larger than the sum of its proper divisors (1169356).

1388444 is a wasteful number, since it uses less digits than its factorization.

1388444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18292 (or 18290 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 1388444 is about 1178.3225364899. The cubic root of 1388444 is about 111.5602441436.

The spelling of 1388444 in words is "one million, three hundred eighty-eight thousand, four hundred forty-four".