2857256 has 16 divisors (see below), whose sum is σ = 5418900. Its totient is φ = 1412224.

The previous prime is 2857247. The next prime is 2857259. The reversal of 2857256 is 6527582.

It can be written as a sum of positive squares in 2 ways, for example, as 2856100 + 1156 = 1690^2 + 34^2 .

It is not an unprimeable number, because it can be changed into a prime (2857259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295 + ... + 2718.

2^2857256 is an apocalyptic number.

It is an amenable number.

2857256 is a deficient number, since it is larger than the sum of its proper divisors (2561644).

2857256 is a wasteful number, since it uses less digits than its factorization.

2857256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108 (or 4104 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 2857256 is about 1690.3419772342. The cubic root of 2857256 is about 141.9002142304.

It can be divided in two parts, 2857 and 256, that added together give a palindrome (3113).

The spelling of 2857256 in words is "two million, eight hundred fifty-seven thousand, two hundred fifty-six".