168912540 has 120 divisors (see below), whose sum is σ = 534707712. Its totient is φ = 44634240.

The previous prime is 168912517. The next prime is 168912547. The reversal of 168912540 is 45219861.

168912540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 168912495 and 168912504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168912547) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 205330 + ... + 206150.

Almost surely, 2^168912540 is an apocalyptic number.

168912540 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 168912540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267353856).

168912540 is an abundant number, since it is smaller than the sum of its proper divisors (365795172).

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

168912540 is a wasteful number, since it uses less digits than its factorization.

168912540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 168912540 is about 12996.6357185235. The cubic root of 168912540 is about 552.7820908189.

The spelling of 168912540 in words is "one hundred sixty-eight million, nine hundred twelve thousand, five hundred forty".