1389568 has 44 divisors (see below), whose sum is σ = 2947680. Its totient is φ = 653312.

The previous prime is 1389559. The next prime is 1389569. The reversal of 1389568 is 8659831.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389569) 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, 23523 + ... + 23581.

2^1389568 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 1389568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473840).

1389568 is an abundant number, since it is smaller than the sum of its proper divisors (1558112).

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

1389568 is an equidigital number, since it uses as much as digits as its factorization.

1389568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 84 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 1389568 is about 1178.7993892092. The cubic root of 1389568 is about 111.5903401581.

The spelling of 1389568 in words is "one million, three hundred eighty-nine thousand, five hundred sixty-eight".