2747856 has 80 divisors (see below), whose sum is σ = 7856640. Its totient is φ = 823680.

The previous prime is 2747851. The next prime is 2747869. The reversal of 2747856 is 6587472.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2747851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20911 + ... + 21041.

It is an arithmetic number, because the mean of its divisors is an integer number (98208).

2^2747856 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 2747856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3928320).

2747856 is an abundant number, since it is smaller than the sum of its proper divisors (5108784).

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

2747856 is a wasteful number, since it uses less digits than its factorization.

2747856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 2747856 is about 1657.6658288087. The cubic root of 2747856 is about 140.0655475374.

The spelling of 2747856 in words is "two million, seven hundred forty-seven thousand, eight hundred fifty-six".