320042140 has 96 divisors (see below), whose sum is σ = 764080128. Its totient is φ = 111552000.

The previous prime is 320042123. The next prime is 320042141. The reversal of 320042140 is 41240023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320042141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1138800 + ... + 1139080.

It is an arithmetic number, because the mean of its divisors is an integer number (7959168).

Almost surely, 2^320042140 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 320042140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382040064).

320042140 is an abundant number, since it is smaller than the sum of its proper divisors (444037988).

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

320042140 is a wasteful number, since it uses less digits than its factorization.

320042140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 320042140 is about 17889.7216300310. The cubic root of 320042140 is about 684.0204016805.

Adding to 320042140 its reverse (41240023), we get a palindrome (361282163).

The spelling of 320042140 in words is "three hundred twenty million, forty-two thousand, one hundred forty".