2856847 has 8 divisors (see below), whose sum is σ = 3332000. Its totient is φ = 2448432.

The previous prime is 2856823. The next prime is 2856857. The reversal of 2856847 is 7486582.

It is not a de Polignac number, because 2856847 - 2¹¹ = 2854799 is a prime.

2856847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856857) 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, 3822 + ... + 4507.

It is an arithmetic number, because the mean of its divisors is an integer number (416500).

2^2856847 is an apocalyptic number.

2856847 is a deficient number, since it is larger than the sum of its proper divisors (475153).

2856847 is an frugal number, since it uses more digits than its factorization.

2856847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8350 (or 8336 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 2856847 is about 1690.2209914683. The cubic root of 2856847 is about 141.8934431702.

The spelling of 2856847 in words is "two million, eight hundred fifty-six thousand, eight hundred forty-seven".