28585897 has 4 divisors (see below), whose sum is σ = 29283156. Its totient is φ = 27888640.

The previous prime is 28585871. The next prime is 28585901. The reversal of 28585897 is 79858582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2972176 + 25613721 = 1724^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 28585897 - 2⁷ = 28585769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28580897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348568 + ... + 348649.

It is an arithmetic number, because the mean of its divisors is an integer number (7320789).

Almost surely, 2^28585897 is an apocalyptic number.

It is an amenable number.

28585897 is a deficient number, since it is larger than the sum of its proper divisors (697259).

28585897 is an equidigital number, since it uses as much as digits as its factorization.

28585897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697258.

The product of its digits is 1612800, while the sum is 52.

The square root of 28585897 is about 5346.5780645194. The cubic root of 28585897 is about 305.7623034829.

The spelling of 28585897 in words is "twenty-eight million, five hundred eighty-five thousand, eight hundred ninety-seven".