3491856 has 80 divisors (see below), whose sum is σ = 10267200. Its totient is φ = 1135872.

The previous prime is 3491843. The next prime is 3491857. The reversal of 3491856 is 6581943.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3491856.

It is not an unprimeable number, because it can be changed into a prime (3491857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25420 + ... + 25556.

It is an arithmetic number, because the mean of its divisors is an integer number (128340).

Almost surely, 2^3491856 is an apocalyptic number.

3491856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3491856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5133600).

3491856 is an abundant number, since it is smaller than the sum of its proper divisors (6775344).

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

3491856 is a wasteful number, since it uses less digits than its factorization.

3491856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 201 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3491856 is about 1868.6508502125. The cubic root of 3491856 is about 151.7115953249.

The spelling of 3491856 in words is "three million, four hundred ninety-one thousand, eight hundred fifty-six".