168331940 has 96 divisors (see below), whose sum is σ = 428972544. Its totient is φ = 54236160.

The previous prime is 168331903. The next prime is 168331951. The reversal of 168331940 is 49133861.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 168331940.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195992 + ... + 196848.

It is an arithmetic number, because the mean of its divisors is an integer number (4468464).

Almost surely, 2^168331940 is an apocalyptic number.

168331940 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 168331940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214486272).

168331940 is an abundant number, since it is smaller than the sum of its proper divisors (260640604).

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

168331940 is a wasteful number, since it uses less digits than its factorization.

168331940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 168331940 is about 12974.2799414842. The cubic root of 168331940 is about 552.1480078151.

The spelling of 168331940 in words is "one hundred sixty-eight million, three hundred thirty-one thousand, nine hundred forty".