2820399 has 8 divisors (see below), whose sum is σ = 3862320. Its totient is φ = 1829376.

The previous prime is 2820383. The next prime is 2820401. The reversal of 2820399 is 9930282.

2820399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2820399 - 2⁴ = 2820383 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2820399 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820319) 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 7 ways as a sum of consecutive naturals, for example, 12594 + ... + 12815.

It is an arithmetic number, because the mean of its divisors is an integer number (482790).

2^2820399 is an apocalyptic number.

2820399 is a deficient number, since it is larger than the sum of its proper divisors (1041921).

2820399 is a wasteful number, since it uses less digits than its factorization.

2820399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25449.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 2820399 is about 1679.4043586939. The cubic root of 2820399 is about 141.2874273649.

The spelling of 2820399 in words is "two million, eight hundred twenty thousand, three hundred ninety-nine".