168133720 has 32 divisors (see below), whose sum is σ = 378756000. Its totient is φ = 67172608.

The previous prime is 168133709. The next prime is 168133729. The reversal of 168133720 is 27331861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168133729) 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, 39957 + ... + 43963.

It is an arithmetic number, because the mean of its divisors is an integer number (11836125).

Almost surely, 2^168133720 is an apocalyptic number.

168133720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168133720 is an abundant number, since it is smaller than the sum of its proper divisors (210622280).

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

168133720 is a wasteful number, since it uses less digits than its factorization.

168133720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067 (or 5063 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 168133720 is about 12966.6387317608. The cubic root of 168133720 is about 551.9311946025.

The spelling of 168133720 in words is "one hundred sixty-eight million, one hundred thirty-three thousand, seven hundred twenty".