2291140 has 24 divisors (see below), whose sum is σ = 4865112. Its totient is φ = 906240.

The previous prime is 2291131. The next prime is 2291143. The reversal of 2291140 is 411922.

2291140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 611524 + 1679616 = 782^2 + 1296^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291143) 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 7 ways as a sum of consecutive naturals, for example, 1350 + ... + 2530.

It is an arithmetic number, because the mean of its divisors is an integer number (202713).

2^2291140 is an apocalyptic number.

2291140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2291140 is an abundant number, since it is smaller than the sum of its proper divisors (2573972).

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

2291140 is a wasteful number, since it uses less digits than its factorization.

2291140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2291140 is about 1513.6512147784. The cubic root of 2291140 is about 131.8308976311.

It can be divided in two parts, 229 and 1140, that added together give a square (1369 = 37²).

The spelling of 2291140 in words is "two million, two hundred ninety-one thousand, one hundred forty".