239668660 has 96 divisors (see below), whose sum is σ = 660602880. Its totient is φ = 70761600.

The previous prime is 239668633. The next prime is 239668661. The reversal of 239668660 is 66866932.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 239668660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239668661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 25165 + ... + 33355.

It is an arithmetic number, because the mean of its divisors is an integer number (6881280).

Almost surely, 2^239668660 is an apocalyptic number.

239668660 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 239668660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330301440).

239668660 is an abundant number, since it is smaller than the sum of its proper divisors (420934220).

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

239668660 is a wasteful number, since it uses less digits than its factorization.

239668660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237 (or 8235 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 239668660 is about 15481.2357387904. The cubic root of 239668660 is about 621.1603832531.

The spelling of 239668660 in words is "two hundred thirty-nine million, six hundred sixty-eight thousand, six hundred sixty".