168516740 has 24 divisors (see below), whose sum is σ = 404440512. Its totient is φ = 57777120.

The previous prime is 168516739. The next prime is 168516763. The reversal of 168516740 is 47615861.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 168516694 and 168516703.

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, 601706 + ... + 601985.

It is an arithmetic number, because the mean of its divisors is an integer number (16851688).

Almost surely, 2^168516740 is an apocalyptic number.

168516740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168516740 is an abundant number, since it is smaller than the sum of its proper divisors (235923772).

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

168516740 is a wasteful number, since it uses less digits than its factorization.

168516740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203707 (or 1203705 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 168516740 is about 12981.3997704408. The cubic root of 168516740 is about 552.3499889619.

The spelling of 168516740 in words is "one hundred sixty-eight million, five hundred sixteen thousand, seven hundred forty".