1388544 has 52 divisors (see below), whose sum is σ = 3735096. Its totient is φ = 458752.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388544 is 4458831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12232 + ... + 12344.

2^1388544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867548).

1388544 is an abundant number, since it is smaller than the sum of its proper divisors (2346552).

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

1388544 is an equidigital number, since it uses as much as digits as its factorization.

1388544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 118 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 1388544 is about 1178.3649689294. The cubic root of 1388544 is about 111.5629223830.

The spelling of 1388544 in words is "one million, three hundred eighty-eight thousand, five hundred forty-four".