320745646 has 8 divisors (see below), whose sum is σ = 518127624. Its totient is φ = 148036440.

The previous prime is 320745629. The next prime is 320745673. The reversal of 320745646 is 646547023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6168160 + ... + 6168211.

It is an arithmetic number, because the mean of its divisors is an integer number (64765953).

Almost surely, 2^320745646 is an apocalyptic number.

320745646 is a deficient number, since it is larger than the sum of its proper divisors (197381978).

320745646 is a wasteful number, since it uses less digits than its factorization.

320745646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12336386.

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 320745646 is about 17909.3731325248. The cubic root of 320745646 is about 684.5212318645.

The spelling of 320745646 in words is "three hundred twenty million, seven hundred forty-five thousand, six hundred forty-six".