320245520 has 40 divisors (see below), whose sum is σ = 850939584. Its totient is φ = 109798272.

The previous prime is 320245511. The next prime is 320245529. The reversal of 320245520 is 25542023.

It is an interprime number because it is at equal distance from previous prime (320245511) and next prime (320245529).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (320245529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285374 + ... + 286493.

Almost surely, 2^320245520 is an apocalyptic number.

It is an amenable number.

320245520 is an abundant number, since it is smaller than the sum of its proper divisors (530694064).

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

320245520 is a wasteful number, since it uses less digits than its factorization.

320245520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571887 (or 571881 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 320245520 is about 17895.4049968141. The cubic root of 320245520 is about 684.1652644906.

Adding to 320245520 its reverse (25542023), we get a palindrome (345787543).

The spelling of 320245520 in words is "three hundred twenty million, two hundred forty-five thousand, five hundred twenty".