320140646 has 8 divisors (see below), whose sum is σ = 548812560. Its totient is φ = 137203128.

The previous prime is 320140621. The next prime is 320140649. The reversal of 320140646 is 646041023.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320140649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11433581 + ... + 11433608.

It is an arithmetic number, because the mean of its divisors is an integer number (68601570).

Almost surely, 2^320140646 is an apocalyptic number.

320140646 is a deficient number, since it is larger than the sum of its proper divisors (228671914).

320140646 is a wasteful number, since it uses less digits than its factorization.

320140646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22867198.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 320140646 is about 17892.4745633465. The cubic root of 320140646 is about 684.0905728585.

Adding to 320140646 its reverse (646041023), we get a palindrome (966181669).

The spelling of 320140646 in words is "three hundred twenty million, one hundred forty thousand, six hundred forty-six".