168158740 has 48 divisors (see below), whose sum is σ = 372859200. Its totient is φ = 63528192.

The previous prime is 168158723. The next prime is 168158741. The reversal of 168158740 is 47851861.

It is a junction number, because it is equal to n+sod(n) for n = 168158693 and 168158702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168158741) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 207456 + ... + 208264.

It is an arithmetic number, because the mean of its divisors is an integer number (7767900).

Almost surely, 2^168158740 is an apocalyptic number.

168158740 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 168158740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186429600).

168158740 is an abundant number, since it is smaller than the sum of its proper divisors (204700460).

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

168158740 is a wasteful number, since it uses less digits than its factorization.

168158740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 168158740 is about 12967.6034794406. The cubic root of 168158740 is about 551.9585708948.

The spelling of 168158740 in words is "one hundred sixty-eight million, one hundred fifty-eight thousand, seven hundred forty".