6565728 has 48 divisors (see below), whose sum is σ = 18564336. Its totient is φ = 2019840.

The previous prime is 6565721. The next prime is 6565729. The reversal of 6565728 is 8275656.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1383 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (386757).

Almost surely, 2^6565728 is an apocalyptic number.

It is an amenable number.

6565728 is an abundant number, since it is smaller than the sum of its proper divisors (11998608).

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

6565728 is a wasteful number, since it uses less digits than its factorization.

6565728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287 (or 5279 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 6565728 is about 2562.3676551190. The cubic root of 6565728 is about 187.2525018932.

The spelling of 6565728 in words is "six million, five hundred sixty-five thousand, seven hundred twenty-eight".