40044015 has 24 divisors (see below), whose sum is σ = 75720528. Its totient is φ = 19415040.

The previous prime is 40044013. The next prime is 40044019. The reversal of 40044015 is 51044004.

It is not a de Polignac number, because 40044015 - 2¹ = 40044013 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 39954 + ... + 40943.

It is an arithmetic number, because the mean of its divisors is an integer number (3155022).

Almost surely, 2^40044015 is an apocalyptic number.

40044015 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40044015 is a deficient number, since it is larger than the sum of its proper divisors (35676513).

40044015 is a wasteful number, since it uses less digits than its factorization.

40044015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80919 (or 80916 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40044015 is about 6328.0340549020. The cubic root of 40044015 is about 342.1205843382.

Adding to 40044015 its reverse (51044004), we get a palindrome (91088019).

The spelling of 40044015 in words is "forty million, forty-four thousand, fifteen".