1389872 has 40 divisors (see below), whose sum is σ = 3013200. Its totient is φ = 615680.

The previous prime is 1389853. The next prime is 1389877. The reversal of 1389872 is 2789831.

It is not an unprimeable number, because it can be changed into a prime (1389877) 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, 9254 + ... + 9402.

It is an arithmetic number, because the mean of its divisors is an integer number (75330).

2^1389872 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 1389872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506600).

1389872 is an abundant number, since it is smaller than the sum of its proper divisors (1623328).

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

1389872 is a wasteful number, since it uses less digits than its factorization.

1389872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 215 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 1389872 is about 1178.9283269139. The cubic root of 1389872 is about 111.5984772170.

The spelling of 1389872 in words is "one million, three hundred eighty-nine thousand, eight hundred seventy-two".