3021816 has 32 divisors (see below), whose sum is σ = 8634240. Its totient is φ = 863328.

The previous prime is 3021797. The next prime is 3021833. The reversal of 3021816 is 6181203.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 3021792 and 3021801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8826 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (269820).

Almost surely, 2^3021816 is an apocalyptic number.

It is an amenable number.

3021816 is an abundant number, since it is smaller than the sum of its proper divisors (5612424).

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

3021816 is a wasteful number, since it uses less digits than its factorization.

3021816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18003 (or 17999 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3021816 is about 1738.3371364612. The cubic root of 3021816 is about 144.5737143002.

The spelling of 3021816 in words is "three million, twenty-one thousand, eight hundred sixteen".