320740560 has 240 divisors, whose sum is σ = 1277168256. Its totient is φ = 73281024.

The previous prime is 320740523. The next prime is 320740571. The reversal of 320740560 is 65047023.

It is a happy number.

320740560 is a `hidden beast` number, since 32 + 0 + 74 + 0 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×320740560² = 205749013658227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134902 + ... + 137258.

Almost surely, 2^320740560 is an apocalyptic number.

320740560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320740560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (638584128).

320740560 is an abundant number, since it is smaller than the sum of its proper divisors (956427696).

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

320740560 is a wasteful number, since it uses less digits than its factorization.

320740560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392 (or 2374 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 320740560 is about 17909.2311392756. The cubic root of 320740560 is about 684.5176137396.

Adding to 320740560 its reverse (65047023), we get a palindrome (385787583).

The spelling of 320740560 in words is "three hundred twenty million, seven hundred forty thousand, five hundred sixty".