2855691 has 24 divisors (see below), whose sum is σ = 4324320. Its totient is φ = 1814400.

The previous prime is 2855683. The next prime is 2855701. The reversal of 2855691 is 1965582.

It is a happy number.

2855691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2855691 - 2³ = 2855683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2855591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26145 + ... + 26253.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2^2855691 is an apocalyptic number.

2855691 is a deficient number, since it is larger than the sum of its proper divisors (1468629).

2855691 is a wasteful number, since it uses less digits than its factorization.

2855691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 224 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2855691 is about 1689.8789897504. The cubic root of 2855691 is about 141.8743019107.

The spelling of 2855691 in words is "two million, eight hundred fifty-five thousand, six hundred ninety-one".