168147738 has 96 divisors (see below), whose sum is σ = 418908672. Its totient is φ = 50122800.

The previous prime is 168147737. The next prime is 168147743. The reversal of 168147738 is 837741861.

It is a junction number, because it is equal to n+sod(n) for n = 168147693 and 168147702.

It is not an unprimeable number, because it can be changed into a prime (168147737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379345 + ... + 379787.

It is an arithmetic number, because the mean of its divisors is an integer number (4363632).

Almost surely, 2^168147738 is an apocalyptic number.

168147738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168147738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209454336).

168147738 is an abundant number, since it is smaller than the sum of its proper divisors (250760934).

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

168147738 is a wasteful number, since it uses less digits than its factorization.

168147738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 530 counting only the distinct ones).

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

The square root of 168147738 is about 12967.1792615048. The cubic root of 168147738 is about 551.9465331011.

The spelling of 168147738 in words is "one hundred sixty-eight million, one hundred forty-seven thousand, seven hundred thirty-eight".