320140220 has 36 divisors (see below), whose sum is σ = 702818760. Its totient is φ = 122484384.

The previous prime is 320140211. The next prime is 320140229. The reversal of 320140220 is 22041023.

It is an interprime number because it is at equal distance from previous prime (320140211) and next prime (320140229).

It is a junction number, because it is equal to n+sod(n) for n = 320140195 and 320140204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320140229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4550 + ... + 25709.

Almost surely, 2^320140220 is an apocalyptic number.

It is an amenable number.

320140220 is an abundant number, since it is smaller than the sum of its proper divisors (382678540).

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

320140220 is a wasteful number, since it uses less digits than its factorization.

320140220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30314 (or 30289 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 320140220 is about 17892.4626588963. The cubic root of 320140220 is about 684.0902694265.

Adding to 320140220 its reverse (22041023), we get a palindrome (342181243).

The spelling of 320140220 in words is "three hundred twenty million, one hundred forty thousand, two hundred twenty".