320452412520 has 128 divisors (see below), whose sum is σ = 982036016640. Its totient is φ = 83635119360.

The previous prime is 320452412509. The next prime is 320452412549. The reversal of 320452412520 is 25214254023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 915375 + ... + 1216065.

It is an arithmetic number, because the mean of its divisors is an integer number (7672156380).

Almost surely, 2^320452412520 is an apocalyptic number.

320452412520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320452412520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491018008320).

320452412520 is an abundant number, since it is smaller than the sum of its proper divisors (661583604120).

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

320452412520 is a wasteful number, since it uses less digits than its factorization.

320452412520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300895 (or 300891 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 320452412520 its reverse (25214254023), we get a palindrome (345666666543).

The spelling of 320452412520 in words is "three hundred twenty billion, four hundred fifty-two million, four hundred twelve thousand, five hundred twenty".