3891172 has 6 divisors (see below), whose sum is σ = 6809558. Its totient is φ = 1945584.

The previous prime is 3891161. The next prime is 3891197. The reversal of 3891172 is 2711983.

It can be written as a sum of positive squares in only one way, i.e., 2842596 + 1048576 = 1686^2 + 1024^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486393 + ... + 486400.

Almost surely, 2^3891172 is an apocalyptic number.

It is an amenable number.

3891172 is a deficient number, since it is larger than the sum of its proper divisors (2918386).

3891172 is a wasteful number, since it uses less digits than its factorization.

3891172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972797 (or 972795 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 3891172 is about 1972.6053837501. The cubic root of 3891172 is about 157.2872343317.

It can be divided in two parts, 38911 and 72, that added together give a palindrome (38983).

The spelling of 3891172 in words is "three million, eight hundred ninety-one thousand, one hundred seventy-two".