2685890 has 16 divisors (see below), whose sum is σ = 4855032. Its totient is φ = 1069824.

The previous prime is 2685887. The next prime is 2685901. The reversal of 2685890 is 985862.

It can be written as a sum of positive squares in 4 ways, for example, as 1852321 + 833569 = 1361^2 + 913^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2972 + ... + 3768.

2^2685890 is an apocalyptic number.

2685890 is a deficient number, since it is larger than the sum of its proper divisors (2169142).

2685890 is a wasteful number, since it uses less digits than its factorization.

2685890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 2685890 is about 1638.8685121144. The cubic root of 2685890 is about 139.0046752391.

The spelling of 2685890 in words is "two million, six hundred eighty-five thousand, eight hundred ninety".