320504540 has 48 divisors (see below), whose sum is σ = 739307520. Its totient is φ = 116170560.

The previous prime is 320504537. The next prime is 320504551. The reversal of 320504540 is 45405023.

320504540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×320504540² = 205446320321223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9596 + ... + 27075.

It is an arithmetic number, because the mean of its divisors is an integer number (15402240).

Almost surely, 2^320504540 is an apocalyptic number.

It is an amenable number.

320504540 is an abundant number, since it is smaller than the sum of its proper divisors (418802980).

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

320504540 is a wasteful number, since it uses less digits than its factorization.

320504540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36722 (or 36720 counting only the distinct ones).

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

The square root of 320504540 is about 17902.6405873547. The cubic root of 320504540 is about 684.3496696003.

Adding to 320504540 its reverse (45405023), we get a palindrome (365909563).

The spelling of 320504540 in words is "three hundred twenty million, five hundred four thousand, five hundred forty".