28588121 has 4 divisors (see below), whose sum is σ = 28599312. Its totient is φ = 28576932.

The previous prime is 28588099. The next prime is 28588123. The reversal of 28588121 is 12188582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28588121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28588123) 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, 326 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (7149828).

Almost surely, 2^28588121 is an apocalyptic number.

It is an amenable number.

28588121 is a deficient number, since it is larger than the sum of its proper divisors (11191).

28588121 is an equidigital number, since it uses as much as digits as its factorization.

28588121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190.

The product of its digits is 10240, while the sum is 35.

The square root of 28588121 is about 5346.7860439707. The cubic root of 28588121 is about 305.7702327743.

The spelling of 28588121 in words is "twenty-eight million, five hundred eighty-eight thousand, one hundred twenty-one".