40144473 has 24 divisors (see below), whose sum is σ = 63015680. Its totient is φ = 24533280.

The previous prime is 40144471. The next prime is 40144483. The reversal of 40144473 is 37444104.

It is not a de Polignac number, because 40144473 - 2¹ = 40144471 is a prime.

It is a super-2 number, since 2×40144473² = 3223157424895458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40144471) 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, 1515 + ... + 9087.

Almost surely, 2^40144473 is an apocalyptic number.

It is an amenable number.

40144473 is a deficient number, since it is larger than the sum of its proper divisors (22871207).

40144473 is a wasteful number, since it uses less digits than its factorization.

40144473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629 (or 7626 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 40144473 is about 6335.9666192302. The cubic root of 40144473 is about 342.4064368722.

Adding to 40144473 its reverse (37444104), we get a palindrome (77588577).

The spelling of 40144473 in words is "forty million, one hundred forty-four thousand, four hundred seventy-three".