2857239 has 72 divisors (see below), whose sum is σ = 5690880. Its totient is φ = 1360800.

The previous prime is 2857237. The next prime is 2857247. The reversal of 2857239 is 9327582.

It is a happy number.

It is not a de Polignac number, because 2857239 - 2¹ = 2857237 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857237) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 92154 + ... + 92184.

It is an arithmetic number, because the mean of its divisors is an integer number (79040).

2^2857239 is an apocalyptic number.

2857239 is a deficient number, since it is larger than the sum of its proper divisors (2833641).

2857239 is a wasteful number, since it uses less digits than its factorization.

2857239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 71 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2857239 is about 1690.3369486585. The cubic root of 2857239 is about 141.8999328056.

The spelling of 2857239 in words is "two million, eight hundred fifty-seven thousand, two hundred thirty-nine".