320745216 has 72 divisors (see below), whose sum is σ = 931279104. Its totient is φ = 97192960.

The previous prime is 320745209. The next prime is 320745221. The reversal of 320745216 is 612547023.

It is a congruent number.

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, 10536 + ... + 27431.

It is an arithmetic number, because the mean of its divisors is an integer number (12934432).

Almost surely, 2^320745216 is an apocalyptic number.

It is an amenable number.

320745216 is an abundant number, since it is smaller than the sum of its proper divisors (610533888).

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

320745216 is a wasteful number, since it uses less digits than its factorization.

320745216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37997 (or 37983 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 320745216 is about 17909.3611276338. The cubic root of 320745216 is about 684.5209259687.

The spelling of 320745216 in words is "three hundred twenty million, seven hundred forty-five thousand, two hundred sixteen".