40140044 has 12 divisors (see below), whose sum is σ = 80280144. Its totient is φ = 17202864.

The previous prime is 40140019. The next prime is 40140047. The reversal of 40140044 is 44004104.

40140044 is an admirable number.

It is a super-2 number, since 2×40140044² = 3222446264643872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40140047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 716759 + ... + 716814.

It is an arithmetic number, because the mean of its divisors is an integer number (6690012).

Almost surely, 2^40140044 is an apocalyptic number.

It is an amenable number.

40140044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40140044 is a wasteful number, since it uses less digits than its factorization.

40140044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433584 (or 1433582 counting only the distinct ones).

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

The square root of 40140044 is about 6335.6170970159. The cubic root of 40140044 is about 342.3938442389.

Adding to 40140044 its reverse (44004104), we get a palindrome (84144148).

The spelling of 40140044 in words is "forty million, one hundred forty thousand, forty-four".