40140172 has 6 divisors (see below), whose sum is σ = 70245308. Its totient is φ = 20070084.

The previous prime is 40140167. The next prime is 40140173. The reversal of 40140172 is 27104104.

40140172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40140172² = 3222466816379168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40140173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5017518 + ... + 5017525.

Almost surely, 2^40140172 is an apocalyptic number.

It is an amenable number.

40140172 is a deficient number, since it is larger than the sum of its proper divisors (30105136).

40140172 is a wasteful number, since it uses less digits than its factorization.

40140172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10035047 (or 10035045 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 40140172 is about 6335.6271986284. The cubic root of 40140172 is about 342.3942081844.

Adding to 40140172 its reverse (27104104), we get a palindrome (67244276).

The spelling of 40140172 in words is "forty million, one hundred forty thousand, one hundred seventy-two".