168128140 has 48 divisors (see below), whose sum is σ = 358918560. Its totient is φ = 66147840.

The previous prime is 168128101. The next prime is 168128141. The reversal of 168128140 is 41821861.

It is not an unprimeable number, because it can be changed into a prime (168128141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507775 + ... + 508105.

It is an arithmetic number, because the mean of its divisors is an integer number (7477470).

Almost surely, 2^168128140 is an apocalyptic number.

168128140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168128140 is an abundant number, since it is smaller than the sum of its proper divisors (190790420).

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

168128140 is a wasteful number, since it uses less digits than its factorization.

168128140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 168128140 is about 12966.4235624169. The cubic root of 168128140 is about 551.9250887281.

The spelling of 168128140 in words is "one hundred sixty-eight million, one hundred twenty-eight thousand, one hundred forty".