1389002 has 8 divisors (see below), whose sum is σ = 2206116. Its totient is φ = 653632.

The previous prime is 1389001. The next prime is 1389007. The reversal of 1389002 is 2009831.

It can be written as a sum of positive squares in 2 ways, for example, as 1062961 + 326041 = 1031^2 + 571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1389001) 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, 20393 + ... + 20460.

2^1389002 is an apocalyptic number.

1389002 is a deficient number, since it is larger than the sum of its proper divisors (817114).

1389002 is a wasteful number, since it uses less digits than its factorization.

1389002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40872.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1389002 is about 1178.5592899808. The cubic root of 1389002 is about 111.5751870770.

The spelling of 1389002 in words is "one million, three hundred eighty-nine thousand, two".