40158172 has 24 divisors (see below), whose sum is σ = 75980240. Its totient is φ = 18506880.

The previous prime is 40158169. The next prime is 40158179. The reversal of 40158172 is 27185104.

40158172 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 2×40158172² = 3225357556763168, 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 40158172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40158179) 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 in 7 ways as a sum of consecutive naturals, for example, 4329 + ... + 9952.

Almost surely, 2^40158172 is an apocalyptic number.

It is an amenable number.

40158172 is a deficient number, since it is larger than the sum of its proper divisors (35822068).

40158172 is a wasteful number, since it uses less digits than its factorization.

40158172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14341 (or 14339 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 40158172 is about 6337.0475775396. The cubic root of 40158172 is about 342.4453803181.

The spelling of 40158172 in words is "forty million, one hundred fifty-eight thousand, one hundred seventy-two".