168731748 has 60 divisors (see below), whose sum is σ = 442503292. Its totient is φ = 56064960.

The previous prime is 168731747. The next prime is 168731753. The reversal of 168731748 is 847137861.

It can be written as a sum of positive squares in 2 ways, for example, as 47775744 + 120956004 = 6912^2 + 10998^2 .

It is not an unprimeable number, because it can be changed into a prime (168731741) 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 19 ways as a sum of consecutive naturals, for example, 135786 + ... + 137022.

Almost surely, 2^168731748 is an apocalyptic number.

168731748 is a gapful number since it is divisible by the number (18) 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 168731748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221251646).

168731748 is an abundant number, since it is smaller than the sum of its proper divisors (273771544).

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

168731748 is a wasteful number, since it uses less digits than its factorization.

168731748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1663 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 168731748 is about 12989.6785179619. The cubic root of 168731748 is about 552.5848008354.

The spelling of 168731748 in words is "one hundred sixty-eight million, seven hundred thirty-one thousand, seven hundred forty-eight".