168319530 has 48 divisors (see below), whose sum is σ = 441987624. Its totient is φ = 44438400.

The previous prime is 168319517. The next prime is 168319561. The reversal of 168319530 is 35913861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 155077209 + 13242321 = 12453^2 + 3639^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169 + ... + 18348.

Almost surely, 2^168319530 is an apocalyptic number.

168319530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168319530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220993812).

168319530 is an abundant number, since it is smaller than the sum of its proper divisors (273668094).

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

168319530 is a wasteful number, since it uses less digits than its factorization.

168319530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18631 (or 18628 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 168319530 is about 12973.8016787679. The cubic root of 168319530 is about 552.1344387421.

The spelling of 168319530 in words is "one hundred sixty-eight million, three hundred nineteen thousand, five hundred thirty".