2820949 has 4 divisors (see below), whose sum is σ = 2969440. Its totient is φ = 2672460.

The previous prime is 2820947. The next prime is 2820971. The reversal of 2820949 is 9490282.

2820949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2820949 - 2¹ = 2820947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820941) 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 3 ways as a sum of consecutive naturals, for example, 74217 + ... + 74254.

It is an arithmetic number, because the mean of its divisors is an integer number (742360).

2^2820949 is an apocalyptic number.

It is an amenable number.

2820949 is a deficient number, since it is larger than the sum of its proper divisors (148491).

2820949 is a wasteful number, since it uses less digits than its factorization.

2820949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148490.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2820949 is about 1679.5680992446. The cubic root of 2820949 is about 141.2966108214.

The spelling of 2820949 in words is "two million, eight hundred twenty thousand, nine hundred forty-nine".