168385728 has 56 divisors (see below), whose sum is σ = 509170432. Its totient is φ = 48109824.

The previous prime is 168385699. The next prime is 168385747. The reversal of 168385728 is 827583861.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61300 + ... + 63987.

Almost surely, 2^168385728 is an apocalyptic number.

It is an amenable number.

168385728 is an abundant number, since it is smaller than the sum of its proper divisors (340784704).

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

168385728 is a wasteful number, since it uses less digits than its factorization.

168385728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125309 (or 125299 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 168385728 is about 12976.3526462562. The cubic root of 168385728 is about 552.2068118154.

The spelling of 168385728 in words is "one hundred sixty-eight million, three hundred eighty-five thousand, seven hundred twenty-eight".