1388288 has 72 divisors (see below), whose sum is σ = 3311280. Its totient is φ = 573440.

The previous prime is 1388287. The next prime is 1388293. The reversal of 1388288 is 8828831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47858 + ... + 47886.

It is an arithmetic number, because the mean of its divisors is an integer number (45990).

2^1388288 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 1388288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655640).

1388288 is an abundant number, since it is smaller than the sum of its proper divisors (1922992).

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

1388288 is a wasteful number, since it uses less digits than its factorization.

1388288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 59 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 1388288 is about 1178.2563388329. The cubic root of 1388288 is about 111.5560658332.

The spelling of 1388288 in words is "one million, three hundred eighty-eight thousand, two hundred eighty-eight".