2309868 has 72 divisors (see below), whose sum is σ = 6726720. Its totient is φ = 660960.

The previous prime is 2309863. The next prime is 2309869. The reversal of 2309868 is 8689032.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2309863) 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 23 ways as a sum of consecutive naturals, for example, 7371 + ... + 7677.

2^2309868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2309868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3363360).

2309868 is an abundant number, since it is smaller than the sum of its proper divisors (4416852).

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

2309868 is a wasteful number, since it uses less digits than its factorization.

2309868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2309868 is about 1519.8249899248. The cubic root of 2309868 is about 132.1891228445.

The spelling of 2309868 in words is "two million, three hundred nine thousand, eight hundred sixty-eight".