320142320 has 20 divisors (see below), whose sum is σ = 744331080. Its totient is φ = 128056896.

The previous prime is 320142299. The next prime is 320142379. The reversal of 320142320 is 23241023.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×320142320² = 204982210109964800, which contains 22 as substring.

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, 2000810 + ... + 2000969.

It is an arithmetic number, because the mean of its divisors is an integer number (37216554).

Almost surely, 2^320142320 is an apocalyptic number.

It is an amenable number.

320142320 is an abundant number, since it is smaller than the sum of its proper divisors (424188760).

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

320142320 is a wasteful number, since it uses less digits than its factorization.

320142320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001792 (or 4001786 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 320142320 is about 17892.5213427286. The cubic root of 320142320 is about 684.0917652152.

Adding to 320142320 its reverse (23241023), we get a palindrome (343383343).

The spelling of 320142320 in words is "three hundred twenty million, one hundred forty-two thousand, three hundred twenty".