2861128 has 16 divisors (see below), whose sum is σ = 5419260. Its totient is φ = 1416000.

The previous prime is 2861119. The next prime is 2861129. The reversal of 2861128 is 8211682.

It can be written as a sum of positive squares in 2 ways, for example, as 2683044 + 178084 = 1638^2 + 422^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2861096 and 2861105.

It is not an unprimeable number, because it can be changed into a prime (2861129) 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, 963 + ... + 2578.

2^2861128 is an apocalyptic number.

It is an amenable number.

2861128 is a deficient number, since it is larger than the sum of its proper divisors (2558132).

2861128 is a wasteful number, since it uses less digits than its factorization.

2861128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648 (or 3644 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 2861128 is about 1691.4869198430. The cubic root of 2861128 is about 141.9642838164.

It can be divided in two parts, 28611 and 28, that multiplied together give a palindrome (801108).

The spelling of 2861128 in words is "two million, eight hundred sixty-one thousand, one hundred twenty-eight".