3891056 has 30 divisors (see below), whose sum is σ = 8169120. Its totient is φ = 1794624.

The previous prime is 3891053. The next prime is 3891061. The reversal of 3891056 is 6501983.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1985 + ... + 3423.

It is an arithmetic number, because the mean of its divisors is an integer number (272304).

Almost surely, 2^3891056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3891056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4084560).

3891056 is an abundant number, since it is smaller than the sum of its proper divisors (4278064).

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

3891056 is a wasteful number, since it uses less digits than its factorization.

3891056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 3891056 is about 1972.5759807926. The cubic root of 3891056 is about 157.2856713492.

The spelling of 3891056 in words is "three million, eight hundred ninety-one thousand, fifty-six".