320903616 has 168 divisors, whose sum is σ = 983731840. Its totient is φ = 91998720.

The previous prime is 320903591. The next prime is 320903617. The reversal of 320903616 is 616309023.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320903617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 441045 + ... + 441771.

Almost surely, 2^320903616 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 320903616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491865920).

320903616 is an abundant number, since it is smaller than the sum of its proper divisors (662828224).

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

320903616 is a wasteful number, since it uses less digits than its factorization.

320903616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 320903616 is about 17913.7828500850. The cubic root of 320903616 is about 684.6335909595.

The spelling of 320903616 in words is "three hundred twenty million, nine hundred three thousand, six hundred sixteen".