1389828492 has 144 divisors (see below), whose sum is σ = 4013100000. Its totient is φ = 402029568.

The previous prime is 1389828481. The next prime is 1389828547. The reversal of 1389828492 is 2948289831.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1324384 + ... + 1325432.

It is an arithmetic number, because the mean of its divisors is an integer number (27868750).

Almost surely, 2^1389828492 is an apocalyptic number.

1389828492 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 1389828492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006550000).

1389828492 is an abundant number, since it is smaller than the sum of its proper divisors (2623271508).

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

1389828492 is a wasteful number, since it uses less digits than its factorization.

1389828492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240 (or 1235 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1389828492 is about 37280.4035922360. The cubic root of 1389828492 is about 1115.9731272675.

The spelling of 1389828492 in words is "one billion, three hundred eighty-nine million, eight hundred twenty-eight thousand, four hundred ninety-two".