320729142 has 32 divisors (see below), whose sum is σ = 663927264. Its totient is φ = 103219200.

The previous prime is 320729141. The next prime is 320729147. The reversal of 320729142 is 241927023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320729141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17142 + ... + 30582.

It is an arithmetic number, because the mean of its divisors is an integer number (20747727).

Almost surely, 2^320729142 is an apocalyptic number.

320729142 is an abundant number, since it is smaller than the sum of its proper divisors (343198122).

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

320729142 is a wasteful number, since it uses less digits than its factorization.

320729142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 320729142 is about 17908.9123622849. The cubic root of 320729142 is about 684.5094909598.

It can be divided in two parts, 32072 and 9142, that added together give a palindrome (41214).

The spelling of 320729142 in words is "three hundred twenty million, seven hundred twenty-nine thousand, one hundred forty-two".