42318720 has 256 divisors, whose sum is σ = 156672000. Its totient is φ = 10782720.

The previous prime is 42318709. The next prime is 42318721. The reversal of 42318720 is 2781324.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42318721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 535641 + ... + 535719.

It is an arithmetic number, because the mean of its divisors is an integer number (612000).

Almost surely, 2^42318720 is an apocalyptic number.

42318720 is a gapful number since it is divisible by the number (40) 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 42318720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78336000).

42318720 is an abundant number, since it is smaller than the sum of its proper divisors (114353280).

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

42318720 is a wasteful number, since it uses less digits than its factorization.

42318720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 42318720 is about 6505.2840060984. The cubic root of 42318720 is about 348.4797189018.

The spelling of 42318720 in words is "forty-two million, three hundred eighteen thousand, seven hundred twenty".