40004244 has 36 divisors (see below), whose sum is σ = 115568544. Its totient is φ = 11429712.

The previous prime is 40004243. The next prime is 40004267. The reversal of 40004244 is 44240004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79122 + ... + 79625.

Almost surely, 2^40004244 is an apocalyptic number.

It is an amenable number.

40004244 is an abundant number, since it is smaller than the sum of its proper divisors (75564300).

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

40004244 is a wasteful number, since it uses less digits than its factorization.

40004244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158764 (or 158759 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40004244 is about 6324.8908290974. The cubic root of 40004244 is about 342.0072841375.

Adding to 40004244 its reverse (44240004), we get a palindrome (84244248).

The spelling of 40004244 in words is "forty million, four thousand, two hundred forty-four".