2057856 has 64 divisors (see below), whose sum is σ = 5728320. Its totient is φ = 653312.

The previous prime is 2057849. The next prime is 2057857. The reversal of 2057856 is 6587502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057857) 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, 8716 + ... + 8948.

It is an arithmetic number, because the mean of its divisors is an integer number (89505).

2^2057856 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 2057856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2864160).

2057856 is an abundant number, since it is smaller than the sum of its proper divisors (3670464).

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

2057856 is a wasteful number, since it uses less digits than its factorization.

2057856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 2057856 is about 1434.5229172098. The cubic root of 2057856 is about 127.1954747016.

The spelling of 2057856 in words is "two million, fifty-seven thousand, eight hundred fifty-six".