168368728 has 32 divisors (see below), whose sum is σ = 362520000. Its totient is φ = 72502560.

The previous prime is 168368689. The next prime is 168368729. The reversal of 168368728 is 827863861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168368729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48678 + ... + 52021.

It is an arithmetic number, because the mean of its divisors is an integer number (11328750).

Almost surely, 2^168368728 is an apocalyptic number.

It is an amenable number.

168368728 is an abundant number, since it is smaller than the sum of its proper divisors (194151272).

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

168368728 is a wasteful number, since it uses less digits than its factorization.

168368728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100735 (or 100731 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 168368728 is about 12975.6975920372. The cubic root of 168368728 is about 552.1882278339.

The spelling of 168368728 in words is "one hundred sixty-eight million, three hundred sixty-eight thousand, seven hundred twenty-eight".