28499565 has 32 divisors (see below), whose sum is σ = 48974976. Its totient is φ = 14100480.

The previous prime is 28499561. The next prime is 28499573. The reversal of 28499565 is 56599482.

It is not a de Polignac number, because 28499565 - 2² = 28499561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28499561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17850 + ... + 19380.

It is an arithmetic number, because the mean of its divisors is an integer number (1530468).

Almost surely, 2^28499565 is an apocalyptic number.

It is an amenable number.

28499565 is a deficient number, since it is larger than the sum of its proper divisors (20475411).

28499565 is a wasteful number, since it uses less digits than its factorization.

28499565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 777600, while the sum is 48.

The square root of 28499565 is about 5338.4983843774. The cubic root of 28499565 is about 305.4541831335.

The spelling of 28499565 in words is "twenty-eight million, four hundred ninety-nine thousand, five hundred sixty-five".