1389183648 has 96 divisors (see below), whose sum is σ = 3836911680. Its totient is φ = 439511040.

The previous prime is 1389183623. The next prime is 1389183661. The reversal of 1389183648 is 8463819831.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 1389183648.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140863 + ... + 150401.

It is an arithmetic number, because the mean of its divisors is an integer number (39967830).

Almost surely, 2^1389183648 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 1389183648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1918455840).

1389183648 is an abundant number, since it is smaller than the sum of its proper divisors (2447728032).

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

1389183648 is a wasteful number, since it uses less digits than its factorization.

1389183648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630 (or 9622 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 1389183648 is about 37271.7540236571. The cubic root of 1389183648 is about 1115.8005064719.

It can be divided in two parts, 1389183 and 648, that added together give a palindrome (1389831).

The spelling of 1389183648 in words is "one billion, three hundred eighty-nine million, one hundred eighty-three thousand, six hundred forty-eight".