168538338 has 24 divisors (see below), whose sum is σ = 371358000. Its totient is φ = 55226904.

The previous prime is 168538333. The next prime is 168538339. The reversal of 168538338 is 833835861.

It is a junction number, because it is equal to n+sod(n) for n = 168538293 and 168538302.

It is not an unprimeable number, because it can be changed into a prime (168538333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78288 + ... + 80411.

It is an arithmetic number, because the mean of its divisors is an integer number (15473250).

Almost surely, 2^168538338 is an apocalyptic number.

168538338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

168538338 is an abundant number, since it is smaller than the sum of its proper divisors (202819662).

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

168538338 is a wasteful number, since it uses less digits than its factorization.

168538338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158766 (or 158763 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 168538338 is about 12982.2316263422. The cubic root of 168538338 is about 552.3735853228.

The spelling of 168538338 in words is "one hundred sixty-eight million, five hundred thirty-eight thousand, three hundred thirty-eight".