168542208 has 150 divisors (see below), whose sum is σ = 507495296. Its totient is φ = 55738368.

The previous prime is 168542203. The next prime is 168542239. The reversal of 168542208 is 802245861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168542201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1327041 + ... + 1327167.

Almost surely, 2^168542208 is an apocalyptic number.

168542208 is a gapful number since it is divisible by the number (18) 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 168542208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253747648).

168542208 is an abundant number, since it is smaller than the sum of its proper divisors (338953088).

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

168542208 is an frugal number, since it uses more digits than its factorization.

168542208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 168542208 is about 12982.3806753615. The cubic root of 168542208 is about 552.3778131826.

The spelling of 168542208 in words is "one hundred sixty-eight million, five hundred forty-two thousand, two hundred eight".