168921450 has 72 divisors (see below), whose sum is σ = 470678208. Its totient is φ = 45042480.

The previous prime is 168921439. The next prime is 168921451. The reversal of 168921450 is 54129861.

It is not an unprimeable number, because it can be changed into a prime (168921451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5199 + ... + 19101.

Almost surely, 2^168921450 is an apocalyptic number.

168921450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168921450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235339104).

168921450 is an abundant number, since it is smaller than the sum of its proper divisors (301756758).

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

168921450 is a wasteful number, since it uses less digits than its factorization.

168921450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13930 (or 13913 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 168921450 is about 12996.9784950195. The cubic root of 168921450 is about 552.7918102509.

The spelling of 168921450 in words is "one hundred sixty-eight million, nine hundred twenty-one thousand, four hundred fifty".