2399856 has 60 divisors (see below), whose sum is σ = 6623832. Its totient is φ = 748544.

The previous prime is 2399821. The next prime is 2399869. The reversal of 2399856 is 6589932.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13786 + ... + 13958.

2^2399856 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 2399856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3311916).

2399856 is an abundant number, since it is smaller than the sum of its proper divisors (4223976).

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

2399856 is a wasteful number, since it uses less digits than its factorization.

2399856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 195 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 2399856 is about 1549.1468619857. The cubic root of 2399856 is about 133.8839122311.

The spelling of 2399856 in words is "two million, three hundred ninety-nine thousand, eight hundred fifty-six".