163239660 has 72 divisors (see below), whose sum is σ = 503311536. Its totient is φ = 42814080.

The previous prime is 163239649. The next prime is 163239667. The reversal of 163239660 is 66932361.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (163239667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3547 + ... + 18413.

It is an arithmetic number, because the mean of its divisors is an integer number (6990438).

Almost surely, 2^163239660 is an apocalyptic number.

163239660 is a gapful number since it is divisible by the number (10) 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 163239660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251655768).

163239660 is an abundant number, since it is smaller than the sum of its proper divisors (340071876).

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

163239660 is a wasteful number, since it uses less digits than its factorization.

163239660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14943 (or 14938 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 163239660 is about 12776.5276973049. The cubic root of 163239660 is about 546.5231471019.

The spelling of 163239660 in words is "one hundred sixty-three million, two hundred thirty-nine thousand, six hundred sixty".