4000172 has 24 divisors (see below), whose sum is σ = 7689360. Its totient is φ = 1805760.

The previous prime is 4000169. The next prime is 4000189. The reversal of 4000172 is 2710004.

It is a happy number.

4000172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 9878 + ... + 10274.

It is an arithmetic number, because the mean of its divisors is an integer number (320390).

Almost surely, 2^4000172 is an apocalyptic number.

It is an amenable number.

4000172 is a deficient number, since it is larger than the sum of its proper divisors (3689188).

4000172 is a wasteful number, since it uses less digits than its factorization.

4000172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 4000172 is about 2000.0429995378. The cubic root of 4000172 is about 158.7423804390.

Adding to 4000172 its reverse (2710004), we get a palindrome (6710176).

The spelling of 4000172 in words is "four million, one hundred seventy-two", and thus it is an aban number.