2000856 has 96 divisors (see below), whose sum is σ = 6032880. Its totient is φ = 549120.

The previous prime is 2000813. The next prime is 2000863. The reversal of 2000856 is 6580002.

It is a happy number.

It is a super-5 number, since 5×2000856⁵ (a number of 33 digits) contains 55555 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37726 + ... + 37778.

2^2000856 is an apocalyptic number.

2000856 is a gapful number since it is divisible by the number (26) 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 2000856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3016440).

2000856 is an abundant number, since it is smaller than the sum of its proper divisors (4032024).

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

2000856 is a wasteful number, since it uses less digits than its factorization.

2000856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2000856 is about 1414.5161716997. The cubic root of 2000856 is about 126.0100772993.

Subtracting from 2000856 its product of nonzero digits (480), we obtain a cube (2000376 = 126³).

Adding to 2000856 its reverse (6580002), we get a palindrome (8580858).

The spelling of 2000856 in words is "two million, eight hundred fifty-six", and thus it is an aban number.