2261868 has 24 divisors (see below), whose sum is σ = 6031872. Its totient is φ = 646224.

The previous prime is 2261863. The next prime is 2261887. The reversal of 2261868 is 8681622.

It is not an unprimeable number, because it can be changed into a prime (2261863) 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, 13380 + ... + 13547.

It is an arithmetic number, because the mean of its divisors is an integer number (251328).

2^2261868 is an apocalyptic number.

2261868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2261868 is an abundant number, since it is smaller than the sum of its proper divisors (3770004).

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

2261868 is a wasteful number, since it uses less digits than its factorization.

2261868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26941 (or 26939 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 2261868 is about 1503.9507970675. The cubic root of 2261868 is about 131.2670581004.

The spelling of 2261868 in words is "two million, two hundred sixty-one thousand, eight hundred sixty-eight".