2855890 has 16 divisors (see below), whose sum is σ = 5411520. Its totient is φ = 1082160.

The previous prime is 2855873. The next prime is 2855893. The reversal of 2855890 is 985582.

It is a happy number.

It is a super-2 number, since 2×2855890² = 16312215384200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2855893) 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, 7326 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (338220).

2^2855890 is an apocalyptic number.

2855890 is a deficient number, since it is larger than the sum of its proper divisors (2555630).

2855890 is a wasteful number, since it uses less digits than its factorization.

2855890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15057.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 2855890 is about 1689.9378686804. The cubic root of 2855890 is about 141.8775973571.

The spelling of 2855890 in words is "two million, eight hundred fifty-five thousand, eight hundred ninety".