2820257 has 8 divisors (see below), whose sum is σ = 3114720. Its totient is φ = 2532160.

The previous prime is 2820239. The next prime is 2820263. The reversal of 2820257 is 7520282.

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

It is a cyclic number.

It is not a de Polignac number, because 2820257 - 2⁶ = 2820193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (389340).

2^2820257 is an apocalyptic number.

It is an amenable number.

2820257 is a deficient number, since it is larger than the sum of its proper divisors (294463).

2820257 is a wasteful number, since it uses less digits than its factorization.

2820257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2820257 is about 1679.3620812678. The cubic root of 2820257 is about 141.2850561695.

The spelling of 2820257 in words is "two million, eight hundred twenty thousand, two hundred fifty-seven".