40140424 has 16 divisors (see below), whose sum is σ = 76110300. Its totient is φ = 19844352.

The previous prime is 40140421. The next prime is 40140427. The reversal of 40140424 is 42404104.

It is an interprime number because it is at equal distance from previous prime (40140421) and next prime (40140427).

It can be written as a sum of positive squares in 2 ways, for example, as 31248100 + 8892324 = 5590^2 + 2982^2 .

It is a super-2 number, since 2×40140424² = 3222507277799552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40140421) 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, 27477 + ... + 28900.

Almost surely, 2^40140424 is an apocalyptic number.

It is an amenable number.

40140424 is a deficient number, since it is larger than the sum of its proper divisors (35969876).

40140424 is a wasteful number, since it uses less digits than its factorization.

40140424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56472 (or 56468 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 40140424 is about 6335.6470861310. The cubic root of 40140424 is about 342.3949246999.

Adding to 40140424 its reverse (42404104), we get a palindrome (82544528).

The spelling of 40140424 in words is "forty million, one hundred forty thousand, four hundred twenty-four".