168713440 has 96 divisors (see below), whose sum is σ = 482376384. Its totient is φ = 54435840.

The previous prime is 168713431. The next prime is 168713443. The reversal of 168713440 is 44317861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 168713396 and 168713405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168713443) 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, 14610 + ... + 23470.

It is an arithmetic number, because the mean of its divisors is an integer number (5024754).

Almost surely, 2^168713440 is an apocalyptic number.

168713440 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 168713440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241188192).

168713440 is an abundant number, since it is smaller than the sum of its proper divisors (313662944).

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

168713440 is a wasteful number, since it uses less digits than its factorization.

168713440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8900 (or 8892 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 168713440 is about 12988.9737854844. The cubic root of 168713440 is about 552.5648143014.

The spelling of 168713440 in words is "one hundred sixty-eight million, seven hundred thirteen thousand, four hundred forty".