40044012 has 48 divisors (see below), whose sum is σ = 100880640. Its totient is φ = 12324928.

The previous prime is 40043981. The next prime is 40044013. The reversal of 40044012 is 21044004.

It is a super-2 number, since 2×40044012² = 3207045794112288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40043982 and 40044000.

It is not an unprimeable number, because it can be changed into a prime (40044013) 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, 5503 + ... + 10505.

It is an arithmetic number, because the mean of its divisors is an integer number (2101680).

Almost surely, 2^40044012 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 40044012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50440320).

40044012 is an abundant number, since it is smaller than the sum of its proper divisors (60836628).

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

40044012 is a wasteful number, since it uses less digits than its factorization.

40044012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062 (or 5060 counting only the distinct ones).

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

The square root of 40044012 is about 6328.0338178616. The cubic root of 40044012 is about 342.1205757946.

Adding to 40044012 its reverse (21044004), we get a palindrome (61088016).

The spelling of 40044012 in words is "forty million, forty-four thousand, twelve".