2291860 has 12 divisors (see below), whose sum is σ = 4812948. Its totient is φ = 916736.

The previous prime is 2291851. The next prime is 2291867. The reversal of 2291860 is 681922.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 643204 = 1284^2 + 802^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57277 + ... + 57316.

It is an arithmetic number, because the mean of its divisors is an integer number (401079).

2^2291860 is an apocalyptic number.

2291860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2291860 is an abundant number, since it is smaller than the sum of its proper divisors (2521088).

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

2291860 is a wasteful number, since it uses less digits than its factorization.

2291860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114602 (or 114600 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2291860 is about 1513.8890316004. The cubic root of 2291860 is about 131.8447056488.

The spelling of 2291860 in words is "two million, two hundred ninety-one thousand, eight hundred sixty".