2857229 has 4 divisors (see below), whose sum is σ = 2863584. Its totient is φ = 2850876.

The previous prime is 2857223. The next prime is 2857237. The reversal of 2857229 is 9227582.

2857229 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 a de Polignac number, because none of the positive numbers 2^k-2857229 is a prime.

It is a d-powerful number, because it can be written as 2¹⁰ + 8 + 5⁹ + 7⁷ + 2¹² + 2¹⁴ + 9⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857223) 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, 2447 + ... + 3420.

It is an arithmetic number, because the mean of its divisors is an integer number (715896).

2^2857229 is an apocalyptic number.

It is an amenable number.

2857229 is a deficient number, since it is larger than the sum of its proper divisors (6355).

2857229 is an equidigital number, since it uses as much as digits as its factorization.

2857229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6354.

The product of its digits is 20160, while the sum is 35.

The square root of 2857229 is about 1690.3339906658. Note that the first 3 decimals coincide. The cubic root of 2857229 is about 141.8997672610.

The spelling of 2857229 in words is "two million, eight hundred fifty-seven thousand, two hundred twenty-nine".