2865823 has 4 divisors (see below), whose sum is σ = 2990448. Its totient is φ = 2741200.

The previous prime is 2865817. The next prime is 2865839. The reversal of 2865823 is 3285682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2865823 - 2⁹ = 2865311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62278 + ... + 62323.

It is an arithmetic number, because the mean of its divisors is an integer number (747612).

2^2865823 is an apocalyptic number.

2865823 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2865823 is a deficient number, since it is larger than the sum of its proper divisors (124625).

2865823 is a wasteful number, since it uses less digits than its factorization.

2865823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124624.

The product of its digits is 23040, while the sum is 34.

The square root of 2865823 is about 1692.8741831572. The cubic root of 2865823 is about 142.0418940067.

The spelling of 2865823 in words is "two million, eight hundred sixty-five thousand, eight hundred twenty-three".