320009620 has 48 divisors (see below), whose sum is σ = 769039488. Its totient is φ = 109572480.

The previous prime is 320009611. The next prime is 320009623. The reversal of 320009620 is 26900023.

320009620 is a modest number, since divided by 9620 gives 320 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 320009591 and 320009600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320009623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208255 + ... + 209785.

It is an arithmetic number, because the mean of its divisors is an integer number (16021656).

Almost surely, 2^320009620 is an apocalyptic number.

It is an amenable number.

320009620 is an abundant number, since it is smaller than the sum of its proper divisors (449029868).

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

320009620 is a wasteful number, since it uses less digits than its factorization.

320009620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040 (or 3038 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 320009620 is about 17888.8127051518. The cubic root of 320009620 is about 683.9972327556.

Adding to 320009620 its reverse (26900023), we get a palindrome (346909643).

The spelling of 320009620 in words is "three hundred twenty million, nine thousand, six hundred twenty".