2859840 has 112 divisors (see below), whose sum is σ = 10119360. Its totient is φ = 760320.

The previous prime is 2859803. The next prime is 2859847. The reversal of 2859840 is 489582.

2859840 is a `hidden beast` number, since 28 + 598 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2859795 and 2859804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2859847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8475 + ... + 8805.

2^2859840 is an apocalyptic number.

2859840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2859840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5059680).

2859840 is an abundant number, since it is smaller than the sum of its proper divisors (7259520).

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

2859840 is a wasteful number, since it uses less digits than its factorization.

2859840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2859840 is about 1691.1061468755. The cubic root of 2859840 is about 141.9429778324.

The spelling of 2859840 in words is "two million, eight hundred fifty-nine thousand, eight hundred forty".