40044140 has 12 divisors (see below), whose sum is σ = 84092736. Its totient is φ = 16017648.

The previous prime is 40044139. The next prime is 40044209. The reversal of 40044140 is 4144004.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1001084 + ... + 1001123.

It is an arithmetic number, because the mean of its divisors is an integer number (7007728).

Almost surely, 2^40044140 is an apocalyptic number.

It is an amenable number.

40044140 is an abundant number, since it is smaller than the sum of its proper divisors (44048596).

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

40044140 is a wasteful number, since it uses less digits than its factorization.

40044140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002216 (or 2002214 counting only the distinct ones).

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

The square root of 40044140 is about 6328.0439315795. The cubic root of 40044140 is about 342.1209403217.

Adding to 40044140 its reverse (4144004), we get a palindrome (44188144).

The spelling of 40044140 in words is "forty million, forty-four thousand, one hundred forty".