3021856 has 12 divisors (see below), whose sum is σ = 5949342. Its totient is φ = 1510912.

The previous prime is 3021853. The next prime is 3021871. The reversal of 3021856 is 6581203.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2755600 + 266256 = 1660^2 + 516^2 .

It is a super-2 number, since 2×3021856² = 18263227369472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3021856.

It is not an unprimeable number, because it can be changed into a prime (3021853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47185 + ... + 47248.

Almost surely, 2^3021856 is an apocalyptic number.

It is an amenable number.

3021856 is a deficient number, since it is larger than the sum of its proper divisors (2927486).

3021856 is an equidigital number, since it uses as much as digits as its factorization.

3021856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94443 (or 94435 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3021856 is about 1738.3486416712. The cubic root of 3021856 is about 144.5743522083.

The spelling of 3021856 in words is "three million, twenty-one thousand, eight hundred fifty-six".