2857813 has 8 divisors (see below), whose sum is σ = 3328128. Its totient is φ = 2403024.

The previous prime is 2857801. The next prime is 2857831. The reversal of 2857813 is 3187582.

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 2857813 - 2¹⁷ = 2726741 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 (2857013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3481 + ... + 4222.

It is an arithmetic number, because the mean of its divisors is an integer number (416016).

2^2857813 is an apocalyptic number.

It is an amenable number.

2857813 is a deficient number, since it is larger than the sum of its proper divisors (470315).

2857813 is an equidigital number, since it uses as much as digits as its factorization.

2857813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7763.

The product of its digits is 13440, while the sum is 34.

The square root of 2857813 is about 1690.5067287651. The cubic root of 2857813 is about 141.9094344151.

The spelling of 2857813 in words is "two million, eight hundred fifty-seven thousand, eight hundred thirteen".