5728509 has 8 divisors (see below), whose sum is σ = 8486720. Its totient is φ = 3818988.

The previous prime is 5728477. The next prime is 5728517. The reversal of 5728509 is 9058275.

5728509 is a `hidden beast` number, since 572 + 85 + 0 + 9 = 666.

It is not a de Polignac number, because 5728509 - 2⁵ = 5728477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5728559) 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, 106057 + ... + 106110.

It is an arithmetic number, because the mean of its divisors is an integer number (1060840).

Almost surely, 2^5728509 is an apocalyptic number.

It is an amenable number.

5728509 is a deficient number, since it is larger than the sum of its proper divisors (2758211).

5728509 is a wasteful number, since it uses less digits than its factorization.

5728509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212176 (or 212170 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 5728509 is about 2393.4303833619. The cubic root of 5728509 is about 178.9289169815.

The spelling of 5728509 in words is "five million, seven hundred twenty-eight thousand, five hundred nine".