168031938 has 16 divisors (see below), whose sum is σ = 337772160. Its totient is φ = 55725936.

The previous prime is 168031931. The next prime is 168031939. The reversal of 168031938 is 839130861.

It is a junction number, because it is equal to n+sod(n) for n = 168031896 and 168031905.

It is not an unprimeable number, because it can be changed into a prime (168031931) 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 7 ways as a sum of consecutive naturals, for example, 69898 + ... + 72261.

It is an arithmetic number, because the mean of its divisors is an integer number (21110760).

Almost surely, 2^168031938 is an apocalyptic number.

168031938 is an abundant number, since it is smaller than the sum of its proper divisors (169740222).

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

168031938 is a wasteful number, since it uses less digits than its factorization.

168031938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142361.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 168031938 is about 12962.7133733644. The cubic root of 168031938 is about 551.8197991402.

The spelling of 168031938 in words is "one hundred sixty-eight million, thirty-one thousand, nine hundred thirty-eight".