3021820 has 12 divisors (see below), whose sum is σ = 6345864. Its totient is φ = 1208720.

The previous prime is 3021797. The next prime is 3021833. The reversal of 3021820 is 281203.

It is a happy number.

It is a super-2 number, since 2×3021820² = 18262792224800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3021794 and 3021803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75526 + ... + 75565.

It is an arithmetic number, because the mean of its divisors is an integer number (528822).

Almost surely, 2^3021820 is an apocalyptic number.

It is an amenable number.

3021820 is an abundant number, since it is smaller than the sum of its proper divisors (3324044).

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

3021820 is a wasteful number, since it uses less digits than its factorization.

3021820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151100 (or 151098 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3021820 is about 1738.3382869856. The cubic root of 3021820 is about 144.5737780912.

The spelling of 3021820 in words is "three million, twenty-one thousand, eight hundred twenty".