1389806328 has 32 divisors (see below), whose sum is σ = 3493722960. Its totient is φ = 460707840.

The previous prime is 1389806293. The next prime is 1389806329. The reversal of 1389806328 is 8236089831.

1389806328 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389806329) 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, 155625 + ... + 164312.

Almost surely, 2^1389806328 is an apocalyptic number.

It is an amenable number.

1389806328 is an abundant number, since it is smaller than the sum of its proper divisors (2103916632).

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

1389806328 is a wasteful number, since it uses less digits than its factorization.

1389806328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320127 (or 320123 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 1389806328 is about 37280.1063303205. The cubic root of 1389806328 is about 1115.9671949864.

The spelling of 1389806328 in words is "one billion, three hundred eighty-nine million, eight hundred six thousand, three hundred twenty-eight".