28007589 has 4 divisors (see below), whose sum is σ = 37343456. Its totient is φ = 18671724.

The previous prime is 28007569. The next prime is 28007597. The reversal of 28007589 is 98570082.

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.

It is not a de Polignac number, because 28007589 - 2⁷ = 28007461 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 (28007509) 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, 4667929 + ... + 4667934.

It is an arithmetic number, because the mean of its divisors is an integer number (9335864).

Almost surely, 2^28007589 is an apocalyptic number.

It is an amenable number.

28007589 is a deficient number, since it is larger than the sum of its proper divisors (9335867).

28007589 is an equidigital number, since it uses as much as digits as its factorization.

28007589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9335866.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 28007589 is about 5292.2196666427. The cubic root of 28007589 is about 303.6863288448.

The spelling of 28007589 in words is "twenty-eight million, seven thousand, five hundred eighty-nine".