40518240 has 192 divisors, whose sum is σ = 150958080. Its totient is φ = 8939520.

The previous prime is 40518239. The next prime is 40518253. The reversal of 40518240 is 4281504.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40518240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103966 + ... + 104354.

It is an arithmetic number, because the mean of its divisors is an integer number (786240).

Almost surely, 2^40518240 is an apocalyptic number.

40518240 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 40518240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75479040).

40518240 is an abundant number, since it is smaller than the sum of its proper divisors (110439840).

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

40518240 is a wasteful number, since it uses less digits than its factorization.

40518240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 40518240 is about 6365.3939391054. The cubic root of 40518240 is about 343.4658195661.

Adding to 40518240 its reverse (4281504), we get a palindrome (44799744).

The spelling of 40518240 in words is "forty million, five hundred eighteen thousand, two hundred forty".