40218112 has 80 divisors (see below), whose sum is σ = 90498672. Its totient is φ = 17694720.

The previous prime is 40218103. The next prime is 40218119. The reversal of 40218112 is 21181204.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40218112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40218119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208288 + ... + 208480.

Almost surely, 2^40218112 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 40218112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45249336).

40218112 is an abundant number, since it is smaller than the sum of its proper divisors (50280560).

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

40218112 is a wasteful number, since it uses less digits than its factorization.

40218112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 40218112 is about 6341.7751458089. The cubic root of 40218112 is about 342.6156733626.

Adding to 40218112 its reverse (21181204), we get a palindrome (61399316).

The spelling of 40218112 in words is "forty million, two hundred eighteen thousand, one hundred twelve".