2857156 has 12 divisors (see below), whose sum is σ = 5294268. Its totient is φ = 1344512.

The previous prime is 2857123. The next prime is 2857159. The reversal of 2857156 is 6517582.

It can be written as a sum of positive squares in 2 ways, for example, as 1254400 + 1602756 = 1120^2 + 1266^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2857159) 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, 20941 + ... + 21076.

It is an arithmetic number, because the mean of its divisors is an integer number (441189).

2^2857156 is an apocalyptic number.

It is an amenable number.

2857156 is a deficient number, since it is larger than the sum of its proper divisors (2437112).

2857156 is a wasteful number, since it uses less digits than its factorization.

2857156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42038 (or 42036 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The square root of 2857156 is about 1690.3123971621. The cubic root of 2857156 is about 141.8985587742.

The spelling of 2857156 in words is "two million, eight hundred fifty-seven thousand, one hundred fifty-six".