2856765 has 24 divisors (see below), whose sum is σ = 4862880. Its totient is φ = 1431808.

The previous prime is 2856683. The next prime is 2856773. The reversal of 2856765 is 5676582.

It is a happy number.

It is not a de Polignac number, because 2856765 - 2⁸ = 2856509 is a prime.

It is a super-2 number, since 2×2856765² = 16322212530450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁷ + 8³ + 5⁷ + 6² + 7⁷ + 6⁴ + 5⁹ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4006 + ... + 4664.

It is an arithmetic number, because the mean of its divisors is an integer number (202620).

2^2856765 is an apocalyptic number.

It is an amenable number.

2856765 is a deficient number, since it is larger than the sum of its proper divisors (2006115).

2856765 is a wasteful number, since it uses less digits than its factorization.

2856765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 684 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 2856765 is about 1690.1967341112. The cubic root of 2856765 is about 141.8920855694.

The spelling of 2856765 in words is "two million, eight hundred fifty-six thousand, seven hundred sixty-five".