3147856 has 40 divisors (see below), whose sum is σ = 6588864. Its totient is φ = 1451520.

The previous prime is 3147853. The next prime is 3147883. The reversal of 3147856 is 6587413.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3147853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19231 + ... + 19393.

Almost surely, 2^3147856 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 3147856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3294432).

3147856 is an abundant number, since it is smaller than the sum of its proper divisors (3441008).

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

3147856 is a wasteful number, since it uses less digits than its factorization.

3147856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 253 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 3147856 is about 1774.2198285444. The cubic root of 3147856 is about 146.5564553118.

The spelling of 3147856 in words is "three million, one hundred forty-seven thousand, eight hundred fifty-six".