168332538 has 96 divisors (see below), whose sum is σ = 409546368. Its totient is φ = 45844480.

The previous prime is 168332537. The next prime is 168332543. The reversal of 168332538 is 835233861.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 168332496 and 168332505.

It is not an unprimeable number, because it can be changed into a prime (168332537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283570 + ... + 284162.

It is an arithmetic number, because the mean of its divisors is an integer number (4266108).

Almost surely, 2^168332538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168332538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204773184).

168332538 is an abundant number, since it is smaller than the sum of its proper divisors (241213830).

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

168332538 is a wasteful number, since it uses less digits than its factorization.

168332538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 649 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 168332538 is about 12974.3029870587. The cubic root of 168332538 is about 552.1486616505.

The spelling of 168332538 in words is "one hundred sixty-eight million, three hundred thirty-two thousand, five hundred thirty-eight".