168442340 has 48 divisors (see below), whose sum is σ = 402675840. Its totient is φ = 58586880.

The previous prime is 168442319. The next prime is 168442349. The reversal of 168442340 is 43244861.

It is a junction number, because it is equal to n+sod(n) for n = 168442297 and 168442306.

It is not an unprimeable number, because it can be changed into a prime (168442349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11585 + ... + 21704.

It is an arithmetic number, because the mean of its divisors is an integer number (8389080).

Almost surely, 2^168442340 is an apocalyptic number.

168442340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168442340 is an abundant number, since it is smaller than the sum of its proper divisors (234233500).

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

168442340 is a wasteful number, since it uses less digits than its factorization.

168442340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33332 (or 33330 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 168442340 is about 12978.5338154970. The cubic root of 168442340 is about 552.2686896432.

The spelling of 168442340 in words is "one hundred sixty-eight million, four hundred forty-two thousand, three hundred forty".