1389526432 has 48 divisors (see below), whose sum is σ = 3150366912. Its totient is φ = 590952960.

The previous prime is 1389526421. The next prime is 1389526447. The reversal of 1389526432 is 2346259831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5668 + ... + 53020.

It is an arithmetic number, because the mean of its divisors is an integer number (65632644).

Almost surely, 2^1389526432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389526432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575183456).

1389526432 is an abundant number, since it is smaller than the sum of its proper divisors (1760840480).

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

1389526432 is a wasteful number, since it uses less digits than its factorization.

1389526432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47501 (or 47493 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 1389526432 is about 37276.3521820470. The cubic root of 1389526432 is about 1115.8922743018.

The spelling of 1389526432 in words is "one billion, three hundred eighty-nine million, five hundred twenty-six thousand, four hundred thirty-two".