2820939 has 16 divisors (see below), whose sum is σ = 4162944. Its totient is φ = 1684800.

The previous prime is 2820919. The next prime is 2820941. The reversal of 2820939 is 9390282.

2820939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2820939 - 2¹⁷ = 2689867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

2820939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2820919) 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, 1824 + ... + 2994.

It is an arithmetic number, because the mean of its divisors is an integer number (260184).

2^2820939 is an apocalyptic number.

2820939 is a deficient number, since it is larger than the sum of its proper divisors (1342005).

2820939 is a wasteful number, since it uses less digits than its factorization.

2820939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258.

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

The square root of 2820939 is about 1679.5651222861. The cubic root of 2820939 is about 141.2964438601.

Adding to 2820939 its reverse (9390282), we get a palindrome (12211221).

The spelling of 2820939 in words is "two million, eight hundred twenty thousand, nine hundred thirty-nine".