389439648 has 288 divisors, whose sum is σ = 1271350080. Its totient is φ = 112250880.

The previous prime is 389439643. The next prime is 389439649. The reversal of 389439648 is 846934983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 389439594 and 389439603.

It is not an unprimeable number, because it can be changed into a prime (389439643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6600643 + ... + 6600701.

It is an arithmetic number, because the mean of its divisors is an integer number (4414410).

Almost surely, 2^389439648 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 389439648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635675040).

389439648 is an abundant number, since it is smaller than the sum of its proper divisors (881910432).

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

389439648 is a wasteful number, since it uses less digits than its factorization.

389439648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 161 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 389439648 is about 19734.2252951566. The cubic root of 389439648 is about 730.2642741166.

The spelling of 389439648 in words is "three hundred eighty-nine million, four hundred thirty-nine thousand, six hundred forty-eight".