40518212 has 48 divisors (see below), whose sum is σ = 84239232. Its totient is φ = 16692480.

The previous prime is 40518211. The next prime is 40518223. The reversal of 40518212 is 21281504.

It is not an unprimeable number, because it can be changed into a prime (40518211) 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, 87662 + ... + 88122.

It is an arithmetic number, because the mean of its divisors is an integer number (1754984).

Almost surely, 2^40518212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40518212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42119616).

40518212 is an abundant number, since it is smaller than the sum of its proper divisors (43721020).

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

40518212 is a wasteful number, since it uses less digits than its factorization.

40518212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40518212 is about 6365.3917397125. The cubic root of 40518212 is about 343.4657404491.

Adding to 40518212 its reverse (21281504), we get a palindrome (61799716).

The spelling of 40518212 in words is "forty million, five hundred eighteen thousand, two hundred twelve".