168143040 has 280 divisors, whose sum is σ = 645414000. Its totient is φ = 41306112.

The previous prime is 168142991. The next prime is 168143057. The reversal of 168143040 is 40341861.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 168142995 and 168143013.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 336711 + ... + 337209.

It is an arithmetic number, because the mean of its divisors is an integer number (2305050).

Almost surely, 2^168143040 is an apocalyptic number.

168143040 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 168143040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322707000).

168143040 is an abundant number, since it is smaller than the sum of its proper divisors (477270960).

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

168143040 is a wasteful number, since it uses less digits than its factorization.

168143040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 168143040 is about 12966.9981105883. The cubic root of 168143040 is about 551.9413926435.

The spelling of 168143040 in words is "one hundred sixty-eight million, one hundred forty-three thousand, forty".