168707840 has 144 divisors (see below), whose sum is σ = 486635520. Its totient is φ = 54743040.

The previous prime is 168707839. The next prime is 168707849. The reversal of 168707840 is 48707861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168707849) 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, 169745 + ... + 170735.

Almost surely, 2^168707840 is an apocalyptic number.

168707840 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 168707840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243317760).

168707840 is an abundant number, since it is smaller than the sum of its proper divisors (317927680).

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

168707840 is an equidigital number, since it uses as much as digits as its factorization.

168707840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 168707840 is about 12988.7582162422. The cubic root of 168707840 is about 552.5587005873.

The spelling of 168707840 in words is "one hundred sixty-eight million, seven hundred seven thousand, eight hundred forty".