320311020 has 48 divisors (see below), whose sum is σ = 897942528. Its totient is φ = 85314240.

The previous prime is 320311001. The next prime is 320311021. The reversal of 320311020 is 20113023.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 320310987 and 320311005.

It is not an unprimeable number, because it can be changed into a prime (320311021) 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, 56767 + ... + 62153.

It is an arithmetic number, because the mean of its divisors is an integer number (18707136).

Almost surely, 2^320311020 is an apocalyptic number.

320311020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320311020 is an abundant number, since it is smaller than the sum of its proper divisors (577631508).

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

320311020 is a wasteful number, since it uses less digits than its factorization.

320311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6388 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 320311020 is about 17897.2349819742. The cubic root of 320311020 is about 684.2119055490.

Adding to 320311020 its reverse (20113023), we get a palindrome (340424043).

The spelling of 320311020 in words is "three hundred twenty million, three hundred eleven thousand, twenty".