320244020 has 48 divisors (see below), whose sum is σ = 687829968. Its totient is φ = 125199360.

The previous prime is 320244007. The next prime is 320244053. The reversal of 320244020 is 20442023.

It can be written as a sum of positive squares in 8 ways, for example, as 17623204 + 302620816 = 4198^2 + 17396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320244020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420440 + ... + 421200.

It is an arithmetic number, because the mean of its divisors is an integer number (14329791).

Almost surely, 2^320244020 is an apocalyptic number.

It is an amenable number.

320244020 is an abundant number, since it is smaller than the sum of its proper divisors (367585948).

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

320244020 is a wasteful number, since it uses less digits than its factorization.

320244020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 320244020 is about 17895.3630865652. The cubic root of 320244020 is about 684.1641963003.

Adding to 320244020 its reverse (20442023), we get a palindrome (340686043).

The spelling of 320244020 in words is "three hundred twenty million, two hundred forty-four thousand, twenty".