40144444 has 12 divisors (see below), whose sum is σ = 71099784. Its totient is φ = 19830224.

The previous prime is 40144421. The next prime is 40144459. The reversal of 40144444 is 44444104.

It is a happy number.

It is a super-2 number, since 2×40144444² = 3223152768138272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60127 + ... + 60790.

It is an arithmetic number, because the mean of its divisors is an integer number (5924982).

Almost surely, 2^40144444 is an apocalyptic number.

It is an amenable number.

40144444 is a deficient number, since it is larger than the sum of its proper divisors (30955340).

40144444 is a wasteful number, since it uses less digits than its factorization.

40144444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121004 (or 121002 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 40144444 is about 6335.9643307077. The cubic root of 40144444 is about 342.4063544218.

Adding to 40144444 its reverse (44444104), we get a palindrome (84588548).

The spelling of 40144444 in words is "forty million, one hundred forty-four thousand, four hundred forty-four".