8021856 has 24 divisors (see below), whose sum is σ = 21057624. Its totient is φ = 2673920.

The previous prime is 8021851. The next prime is 8021863. The reversal of 8021856 is 6581208.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41685 + ... + 41876.

It is an arithmetic number, because the mean of its divisors is an integer number (877401).

Almost surely, 2^8021856 is an apocalyptic number.

It is an amenable number.

8021856 is an abundant number, since it is smaller than the sum of its proper divisors (13035768).

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

8021856 is a wasteful number, since it uses less digits than its factorization.

8021856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83574 (or 83566 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 8021856 is about 2832.2881209369. The cubic root of 8021856 is about 200.1819677219.

The spelling of 8021856 in words is "eight million, twenty-one thousand, eight hundred fifty-six".