168321240 has 96 divisors (see below), whose sum is σ = 567337680. Its totient is φ = 44883072.

The previous prime is 168321193. The next prime is 168321253. The reversal of 168321240 is 42123861.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1062 + ... + 18378.

Almost surely, 2^168321240 is an apocalyptic number.

168321240 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 168321240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283668840).

168321240 is an abundant number, since it is smaller than the sum of its proper divisors (399016440).

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

168321240 is a wasteful number, since it uses less digits than its factorization.

168321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343 (or 17327 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 168321240 is about 12973.8675806407. The cubic root of 168321240 is about 552.1363084928.

The spelling of 168321240 in words is "one hundred sixty-eight million, three hundred twenty-one thousand, two hundred forty".