168540928 has 36 divisors (see below), whose sum is σ = 337304968. Its totient is φ = 84049920.

The previous prime is 168540877. The next prime is 168540929. The reversal of 168540928 is 829045861.

It is a happy number.

It is a super-2 number, since 2×168540928² = 56812088822202368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168540929) 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 3 ways as a sum of consecutive naturals, for example, 145600 + ... + 146752.

Almost surely, 2^168540928 is an apocalyptic number.

It is an amenable number.

168540928 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

168540928 is an equidigital number, since it uses as much as digits as its factorization.

168540928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 168540928 is about 12982.3313776841. The cubic root of 168540928 is about 552.3764148279.

The spelling of 168540928 in words is "one hundred sixty-eight million, five hundred forty thousand, nine hundred twenty-eight".