2011890 has 32 divisors (see below), whose sum is σ = 4867200. Its totient is φ = 532224.

The previous prime is 2011861. The next prime is 2011897. The reversal of 2011890 is 981102.

It is not an unprimeable number, because it can be changed into a prime (2011897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5802 + ... + 6138.

It is an arithmetic number, because the mean of its divisors is an integer number (152100).

2^2011890 is an apocalyptic number.

2011890 is an abundant number, since it is smaller than the sum of its proper divisors (2855310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011890 is a wasteful number, since it uses less digits than its factorization.

2011890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2011890 is about 1418.4110828670. The cubic root of 2011890 is about 126.2412862005.

Adding to 2011890 its reverse (981102), we get a palindrome (2992992).

The spelling of 2011890 in words is "two million, eleven thousand, eight hundred ninety".