40017172 has 18 divisors (see below), whose sum is σ = 75832638. Its totient is φ = 18469152.

The previous prime is 40017169. The next prime is 40017209. The reversal of 40017172 is 27171004.

It can be written as a sum of positive squares in 3 ways, for example, as 125316 + 39891856 = 354^2 + 6316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28923 + ... + 30274.

Almost surely, 2^40017172 is an apocalyptic number.

It is an amenable number.

40017172 is a deficient number, since it is larger than the sum of its proper divisors (35815466).

40017172 is a wasteful number, since it uses less digits than its factorization.

40017172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59227 (or 59212 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 40017172 is about 6325.9127404668. The cubic root of 40017172 is about 342.0441218454.

Adding to 40017172 its reverse (27171004), we get a palindrome (67188176).

The spelling of 40017172 in words is "forty million, seventeen thousand, one hundred seventy-two".