2820819 has 16 divisors (see below), whose sum is σ = 3890592. Its totient is φ = 1817088.

The previous prime is 2820817. The next prime is 2820821. The reversal of 2820819 is 9180282.

2820819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2820817) and next prime (2820821).

It is not a de Polignac number, because 2820819 - 2¹ = 2820817 is a prime.

It is a super-2 number, since 2×2820819² = 15914039661522, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2820817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17889 + ... + 18045.

It is an arithmetic number, because the mean of its divisors is an integer number (243162).

2^2820819 is an apocalyptic number.

2820819 is a deficient number, since it is larger than the sum of its proper divisors (1069773).

2820819 is a wasteful number, since it uses less digits than its factorization.

2820819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 2820819 is about 1679.5293983732. The cubic root of 2820819 is about 141.2944402939.

The spelling of 2820819 in words is "two million, eight hundred twenty thousand, eight hundred nineteen".