2865728 has 14 divisors (see below), whose sum is σ = 5686806. Its totient is φ = 1432832.

The previous prime is 2865727. The next prime is 2865739. The reversal of 2865728 is 8275682.

It can be written as a sum of positive squares in only one way, i.e., 2849344 + 16384 = 1688^2 + 128^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2865691 and 2865700.

It is not an unprimeable number, because it can be changed into a prime (2865727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22325 + ... + 22452.

2^2865728 is an apocalyptic number.

It is an amenable number.

2865728 is a deficient number, since it is larger than the sum of its proper divisors (2821078).

2865728 is an equidigital number, since it uses as much as digits as its factorization.

2865728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44789 (or 44779 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 2865728 is about 1692.8461241353. The cubic root of 2865728 is about 142.0403244600.

It can be divided in two parts, 28 and 65728, that added together give a palindrome (65756).

The spelling of 2865728 in words is "two million, eight hundred sixty-five thousand, seven hundred twenty-eight".