2857439 has 8 divisors (see below), whose sum is σ = 3120432. Its totient is φ = 2600640.

The previous prime is 2857433. The next prime is 2857453. The reversal of 2857439 is 9347582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2857439 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857433) 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, 557 + ... + 2454.

It is an arithmetic number, because the mean of its divisors is an integer number (390054).

2^2857439 is an apocalyptic number.

2857439 is a deficient number, since it is larger than the sum of its proper divisors (262993).

2857439 is a wasteful number, since it uses less digits than its factorization.

2857439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097.

The product of its digits is 60480, while the sum is 38.

The square root of 2857439 is about 1690.3961074257. The cubic root of 2857439 is about 141.9032436154.

The spelling of 2857439 in words is "two million, eight hundred fifty-seven thousand, four hundred thirty-nine".