5721856 has 72 divisors (see below), whose sum is σ = 13604864. Its totient is φ = 2350080.

The previous prime is 5721853. The next prime is 5721889. The reversal of 5721856 is 6581275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5721851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55501 + ... + 55603.

Almost surely, 2^5721856 is an apocalyptic number.

5721856 is a gapful number since it is divisible by the number (56) 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 5721856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6802432).

5721856 is an abundant number, since it is smaller than the sum of its proper divisors (7883008).

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

5721856 is a wasteful number, since it uses less digits than its factorization.

5721856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 143 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The square root of 5721856 is about 2392.0401334426. The cubic root of 5721856 is about 178.8596217410.

The spelling of 5721856 in words is "five million, seven hundred twenty-one thousand, eight hundred fifty-six".