240660 has 72 divisors (see below), whose sum is σ = 838656. Its totient is φ = 54720.

The previous prime is 240659. The next prime is 240677. The reversal of 240660 is 66042.

240660 is a `hidden beast` number, since 2 + 4 + 0 + 660 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1165 + ... + 1355.

It is an arithmetic number, because the mean of its divisors is an integer number (11648).

2²⁴⁰⁶⁶⁰ is an apocalyptic number.

240660 is a gapful number since it is divisible by the number (20) 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 240660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419328).

240660 is an abundant number, since it is smaller than the sum of its proper divisors (597996).

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

240660 is a wasteful number, since it uses less digits than its factorization.

240660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 240660 is about 490.5710957649. The cubic root of 240660 is about 62.2015639092.

It can be divided in two parts, 240 and 660, that added together give a square (900 = 30²).

The spelling of 240660 in words is "two hundred forty thousand, six hundred sixty".