320333140 has 24 divisors (see below), whose sum is σ = 674641800. Its totient is φ = 127763328.

The previous prime is 320333131. The next prime is 320333149. The reversal of 320333140 is 41333023.

It is an interprime number because it is at equal distance from previous prime (320333131) and next prime (320333149).

It can be written as a sum of positive squares in 4 ways, for example, as 24561936 + 295771204 = 4956^2 + 17198^2 .

It is a super-2 number, since 2×320333140² = 205226641164519200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320333149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15967 + ... + 29926.

It is an arithmetic number, because the mean of its divisors is an integer number (28110075).

Almost surely, 2^320333140 is an apocalyptic number.

It is an amenable number.

320333140 is an abundant number, since it is smaller than the sum of its proper divisors (354308660).

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

320333140 is a wasteful number, since it uses less digits than its factorization.

320333140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46251 (or 46249 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 320333140 is about 17897.8529438589. The cubic root of 320333140 is about 684.2276552610.

Adding to 320333140 its reverse (41333023), we get a palindrome (361666163).

The spelling of 320333140 in words is "three hundred twenty million, three hundred thirty-three thousand, one hundred forty".