168316840 has 32 divisors (see below), whose sum is σ = 380712960. Its totient is φ = 66971200.

The previous prime is 168316739. The next prime is 168316853. The reversal of 168316840 is 48613861.

It is a self number, because there is not a number n which added to its sum of digits gives 168316840.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3376 + ... + 18655.

It is an arithmetic number, because the mean of its divisors is an integer number (11897280).

Almost surely, 2^168316840 is an apocalyptic number.

168316840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168316840 is an abundant number, since it is smaller than the sum of its proper divisors (212396120).

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

168316840 is a wasteful number, since it uses less digits than its factorization.

168316840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22233 (or 22229 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 168316840 is about 12973.6980078927. The cubic root of 168316840 is about 552.1314974127.

The spelling of 168316840 in words is "one hundred sixty-eight million, three hundred sixteen thousand, eight hundred forty".