168546840 has 512 divisors, whose sum is σ = 709171200. Its totient is φ = 30965760.

The previous prime is 168546839. The next prime is 168546871. The reversal of 168546840 is 48645861.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 168546792 and 168546801.

It is a congruent number.

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 127 ways as a sum of consecutive naturals, for example, 4555302 + ... + 4555338.

It is an arithmetic number, because the mean of its divisors is an integer number (1385100).

Almost surely, 2^168546840 is an apocalyptic number.

168546840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168546840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354585600).

168546840 is an abundant number, since it is smaller than the sum of its proper divisors (540624360).

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

168546840 is a wasteful number, since it uses less digits than its factorization.

168546840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 168546840 is about 12982.5590697674. The cubic root of 168546840 is about 552.3828734197.

The spelling of 168546840 in words is "one hundred sixty-eight million, five hundred forty-six thousand, eight hundred forty".