168298728 has 128 divisors (see below), whose sum is σ = 483840000. Its totient is φ = 48381696.

The previous prime is 168298717. The next prime is 168298747. The reversal of 168298728 is 827892861.

It is a happy number.

It is a Cunningham number, because it is equal to 12973²-1.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337023 + ... + 337521.

It is an arithmetic number, because the mean of its divisors is an integer number (3780000).

Almost surely, 2^168298728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168298728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241920000).

168298728 is an abundant number, since it is smaller than the sum of its proper divisors (315541272).

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

168298728 is a wasteful number, since it uses less digits than its factorization.

168298728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 587 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 168298728 is about 12972.9999614584. Note that the first 4 decimals coincide. The cubic root of 168298728 is about 552.1116923743. Note that the first 3 decimals are identical.

The spelling of 168298728 in words is "one hundred sixty-eight million, two hundred ninety-eight thousand, seven hundred twenty-eight".