320213240 has 32 divisors (see below), whose sum is σ = 721651680. Its totient is φ = 127876992.

The previous prime is 320213197. The next prime is 320213261. The reversal of 320213240 is 42312023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19694 + ... + 32066.

It is an arithmetic number, because the mean of its divisors is an integer number (22551615).

Almost surely, 2^320213240 is an apocalyptic number.

It is an amenable number.

320213240 is an abundant number, since it is smaller than the sum of its proper divisors (401438440).

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

320213240 is a wasteful number, since it uses less digits than its factorization.

320213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13031 (or 13027 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 320213240 is about 17894.5030665844. The cubic root of 320213240 is about 684.1422762983.

Adding to 320213240 its reverse (42312023), we get a palindrome (362525263).

The spelling of 320213240 in words is "three hundred twenty million, two hundred thirteen thousand, two hundred forty".