320123648 has 72 divisors (see below), whose sum is σ = 704468688. Its totient is φ = 144248832.

The previous prime is 320123603. The next prime is 320123677. The reversal of 320123648 is 846321023.

It is a self number, because there is not a number n which added to its sum of digits gives 320123648.

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, 141986 + ... + 144222.

Almost surely, 2^320123648 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 320123648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352234344).

320123648 is an abundant number, since it is smaller than the sum of its proper divisors (384345040).

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

320123648 is a wasteful number, since it uses less digits than its factorization.

320123648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2295 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 320123648 is about 17891.9995528728. Note that the first 3 decimals coincide. The cubic root of 320123648 is about 684.0784652869.

The spelling of 320123648 in words is "three hundred twenty million, one hundred twenty-three thousand, six hundred forty-eight".