2147856 has 40 divisors (see below), whose sum is σ = 5743680. Its totient is φ = 690816.

The previous prime is 2147843. The next prime is 2147861. The reversal of 2147856 is 6587412.

It is a super-2 number, since 2×2147856² = 9226570793472, which contains 22 as substring.

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

It is a congruent number.

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, 621 + ... + 2163.

It is an arithmetic number, because the mean of its divisors is an integer number (143592).

2^2147856 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 2147856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2871840).

2147856 is an abundant number, since it is smaller than the sum of its proper divisors (3595824).

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

2147856 is a wasteful number, since it uses less digits than its factorization.

2147856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1577 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 2147856 is about 1465.5565495743. The cubic root of 2147856 is about 129.0233717644.

It can be divided in two parts, 2147 and 856, that added together give a palindrome (3003).

The spelling of 2147856 in words is "two million, one hundred forty-seven thousand, eight hundred fifty-six".