40212224 has 72 divisors (see below), whose sum is σ = 88766832. Its totient is φ = 18063360.

The previous prime is 40212209. The next prime is 40212251. The reversal of 40212224 is 42221204.

It is a happy number.

40212224 is nontrivially palindromic in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142964 + ... + 143244.

Almost surely, 2^40212224 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 40212224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44383416).

40212224 is an abundant number, since it is smaller than the sum of its proper divisors (48554608).

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

40212224 is a wasteful number, since it uses less digits than its factorization.

40212224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40212224 is about 6341.3109054832. The cubic root of 40212224 is about 342.5989527075.

Adding to 40212224 its reverse (42221204), we get a palindrome (82433428).

The spelling of 40212224 in words is "forty million, two hundred twelve thousand, two hundred twenty-four".