1389438930 has 128 divisors (see below), whose sum is σ = 3723376896. Its totient is φ = 329011200.

The previous prime is 1389438913. The next prime is 1389438931. The reversal of 1389438930 is 398349831.

1389438930 = 103² + 104² + ... + 1609².

It is a self number, because there is not a number n which added to its sum of digits gives 1389438930.

It is not an unprimeable number, because it can be changed into a prime (1389438931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3300120 + ... + 3300540.

It is an arithmetic number, because the mean of its divisors is an integer number (29088882).

Almost surely, 2^1389438930 is an apocalyptic number.

1389438930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389438930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1861688448).

1389438930 is an abundant number, since it is smaller than the sum of its proper divisors (2333937966).

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

1389438930 is a wasteful number, since it uses less digits than its factorization.

1389438930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 1389438930 is about 37275.1784703977. The cubic root of 1389438930 is about 1115.8688502888.

The spelling of 1389438930 in words is "one billion, three hundred eighty-nine million, four hundred thirty-eight thousand, nine hundred thirty".