320860 has 24 divisors (see below), whose sum is σ = 687456. Its totient is φ = 125760.

The previous prime is 320851. The next prime is 320861. The reversal of 320860 is 68023.

320860 = T₁₃₁ + T₁₃₂ + ... + T₁₆₀.

320860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×320860² = 205902279200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320861) 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, 1089 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (28644).

2³²⁰⁸⁶⁰ is an apocalyptic number.

320860 is the 463-rd centered triangular number.

It is an amenable number.

320860 is an abundant number, since it is smaller than the sum of its proper divisors (366596).

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

320860 is a wasteful number, since it uses less digits than its factorization.

320860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 320860 is about 566.4450547052. The cubic root of 320860 is about 68.4602571956.

Adding to 320860 its reverse (68023), we get a palindrome (388883).

The spelling of 320860 in words is "three hundred twenty thousand, eight hundred sixty".