2856644 has 12 divisors (see below), whose sum is σ = 5713344. Its totient is φ = 1224264.

The previous prime is 2856617. The next prime is 2856653. The reversal of 2856644 is 4466582.

2856644 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

2856644 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50984 + ... + 51039.

It is an arithmetic number, because the mean of its divisors is an integer number (476112).

2^2856644 is an apocalyptic number.

It is an amenable number.

2856644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2856644 is a wasteful number, since it uses less digits than its factorization.

2856644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102034 (or 102032 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 2856644 is about 1690.1609390824. The cubic root of 2856644 is about 141.8900822329.

The spelling of 2856644 in words is "two million, eight hundred fifty-six thousand, six hundred forty-four".