320340032 has 28 divisors (see below), whose sum is σ = 657598380. Its totient is φ = 154646016.

The previous prime is 320339953. The next prime is 320340073. The reversal of 320340032 is 230043023.

It can be written as a sum of positive squares in 2 ways, for example, as 59969536 + 260370496 = 7744^2 + 16136^2 .

It is a super-2 number, since 2×320340032² = 205235472203522048, which contains 22 as substring.

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, 84443 + ... + 88154.

Almost surely, 2^320340032 is an apocalyptic number.

320340032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320340032 is an abundant number, since it is smaller than the sum of its proper divisors (337258348).

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

320340032 is a wasteful number, since it uses less digits than its factorization.

320340032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172638 (or 172628 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 320340032 is about 17898.0454798841. The cubic root of 320340032 is about 684.2325623016.

Adding to 320340032 its reverse (230043023), we get a palindrome (550383055).

The spelling of 320340032 in words is "three hundred twenty million, three hundred forty thousand, thirty-two".