320123138 has 8 divisors (see below), whose sum is σ = 480278160. Its totient is φ = 160030420.

The previous prime is 320123137. The next prime is 320123159. The reversal of 320123138 is 831321023.

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

It is not an unprimeable number, because it can be changed into a prime (320123137) 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, 653 + ... + 25311.

It is an arithmetic number, because the mean of its divisors is an integer number (60034770).

Almost surely, 2^320123138 is an apocalyptic number.

320123138 is a deficient number, since it is larger than the sum of its proper divisors (160155022).

320123138 is a wasteful number, since it uses less digits than its factorization.

320123138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31152.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 320123138 is about 17891.9853006870. The cubic root of 320123138 is about 684.0781020104.

The spelling of 320123138 in words is "three hundred twenty million, one hundred twenty-three thousand, one hundred thirty-eight".