1389037752 has 96 divisors (see below), whose sum is σ = 3840670080. Its totient is φ = 453418560.

The previous prime is 1389037747. The next prime is 1389037753. The reversal of 1389037752 is 2577309831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1389037698 and 1389037707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389037753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 832423 + ... + 834089.

It is an arithmetic number, because the mean of its divisors is an integer number (40006980).

Almost surely, 2^1389037752 is an apocalyptic number.

1389037752 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 1389037752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920335040).

1389037752 is an abundant number, since it is smaller than the sum of its proper divisors (2451632328).

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

1389037752 is a wasteful number, since it uses less digits than its factorization.

1389037752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 1389037752 is about 37269.7967796982. The cubic root of 1389037752 is about 1115.7614435949.

The spelling of 1389037752 in words is "one billion, three hundred eighty-nine million, thirty-seven thousand, seven hundred fifty-two".