2856842 has 8 divisors (see below), whose sum is σ = 4293732. Its totient is φ = 1425600.

The previous prime is 2856823. The next prime is 2856857. The reversal of 2856842 is 2486582.

It can be written as a sum of positive squares in 2 ways, for example, as 2719201 + 137641 = 1649^2 + 371^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 2402.

2^2856842 is an apocalyptic number.

2856842 is a deficient number, since it is larger than the sum of its proper divisors (1436890).

2856842 is a wasteful number, since it uses less digits than its factorization.

2856842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824.

The product of its digits is 30720, while the sum is 35.

The square root of 2856842 is about 1690.2195123711. The cubic root of 2856842 is about 141.8933603904.

The spelling of 2856842 in words is "two million, eight hundred fifty-six thousand, eight hundred forty-two".