40012224 has 84 divisors (see below), whose sum is σ = 123178824. Its totient is φ = 11429376.

The previous prime is 40012211. The next prime is 40012229. The reversal of 40012224 is 42221004.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7282 + ... + 11534.

Almost surely, 2^40012224 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 40012224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61589412).

40012224 is an abundant number, since it is smaller than the sum of its proper divisors (83166600).

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

40012224 is a wasteful number, since it uses less digits than its factorization.

40012224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282 (or 4265 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40012224 is about 6325.5216385686. The cubic root of 40012224 is about 342.0300236971.

Adding to 40012224 its reverse (42221004), we get a palindrome (82233228).

The spelling of 40012224 in words is "forty million, twelve thousand, two hundred twenty-four".