1389072 has 40 divisors (see below), whose sum is σ = 3677344. Its totient is φ = 451584.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389072 is 2709831.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1728 + ... + 2400.

2^1389072 is an apocalyptic number.

1389072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838672).

1389072 is an abundant number, since it is smaller than the sum of its proper divisors (2288272).

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

1389072 is a wasteful number, since it uses less digits than its factorization.

1389072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1389072 is about 1178.5889868822. The cubic root of 1389072 is about 111.5770613560.

The spelling of 1389072 in words is "one million, three hundred eighty-nine thousand, seventy-two".