168016420 has 72 divisors (see below), whose sum is σ = 416888640. Its totient is φ = 56384640.

The previous prime is 168016393. The next prime is 168016439. The reversal of 168016420 is 24610861.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 34921 + ... + 39439.

It is an arithmetic number, because the mean of its divisors is an integer number (5790120).

Almost surely, 2^168016420 is an apocalyptic number.

168016420 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 168016420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208444320).

168016420 is an abundant number, since it is smaller than the sum of its proper divisors (248872220).

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

168016420 is a wasteful number, since it uses less digits than its factorization.

168016420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 168016420 is about 12962.1147965909. The cubic root of 168016420 is about 551.8028114902.

The spelling of 168016420 in words is "one hundred sixty-eight million, sixteen thousand, four hundred twenty".