40144424 has 16 divisors (see below), whose sum is σ = 75338100. Its totient is φ = 20054272.

The previous prime is 40144421. The next prime is 40144459. The reversal of 40144424 is 42444104.

It can be written as a sum of positive squares in 2 ways, for example, as 36602500 + 3541924 = 6050^2 + 1882^2 .

It is a super-2 number, since 2×40144424² = 3223149556583552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40144424.

It is not an unprimeable number, because it can be changed into a prime (40144421) 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, 15854 + ... + 18210.

Almost surely, 2^40144424 is an apocalyptic number.

It is an amenable number.

40144424 is a deficient number, since it is larger than the sum of its proper divisors (35193676).

40144424 is a wasteful number, since it uses less digits than its factorization.

40144424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492 (or 4488 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 40144424 is about 6335.9627524158. The cubic root of 40144424 is about 342.4062975594.

Adding to 40144424 its reverse (42444104), we get a palindrome (82588528).

The spelling of 40144424 in words is "forty million, one hundred forty-four thousand, four hundred twenty-four".