2880821 has 4 divisors (see below), whose sum is σ = 2902944. Its totient is φ = 2858700.

The previous prime is 2880817. The next prime is 2880827. The reversal of 2880821 is 1280882.

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 2880821 - 2² = 2880817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2880827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10865 + ... + 11126.

It is an arithmetic number, because the mean of its divisors is an integer number (725736).

2^2880821 is an apocalyptic number.

It is an amenable number.

2880821 is a deficient number, since it is larger than the sum of its proper divisors (22123).

2880821 is a wasteful number, since it uses less digits than its factorization.

2880821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22122.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 2880821 is about 1697.2981470561. The cubic root of 2880821 is about 142.2892503831.

The spelling of 2880821 in words is "two million, eight hundred eighty thousand, eight hundred twenty-one".