3891272 has 32 divisors (see below), whose sum is σ = 9097920. Its totient is φ = 1515840.

The previous prime is 3891263. The next prime is 3891287. The reversal of 3891272 is 2721983.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543 + ... + 3774.

It is an arithmetic number, because the mean of its divisors is an integer number (284310).

Almost surely, 2^3891272 is an apocalyptic number.

It is an amenable number.

3891272 is an abundant number, since it is smaller than the sum of its proper divisors (5206648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3891272 is a wasteful number, since it uses less digits than its factorization.

3891272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341 (or 6337 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 3891272 is about 1972.6307307755. The cubic root of 3891272 is about 157.2885817054.

It can be divided in two parts, 389 and 1272, that added together give a palindrome (1661).

The spelling of 3891272 in words is "three million, eight hundred ninety-one thousand, two hundred seventy-two".