28947589 has 8 divisors (see below), whose sum is σ = 31633632. Its totient is φ = 26270640.

The previous prime is 28947577. The next prime is 28947601. The reversal of 28947589 is 98574982.

It is an interprime number because it is at equal distance from previous prime (28947577) and next prime (28947601).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28947589 - 2⁷ = 28947461 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 (28947559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5587 + ... + 9439.

It is an arithmetic number, because the mean of its divisors is an integer number (3954204).

Almost surely, 2^28947589 is an apocalyptic number.

It is an amenable number.

28947589 is a deficient number, since it is larger than the sum of its proper divisors (2686043).

28947589 is a wasteful number, since it uses less digits than its factorization.

28947589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547.

The product of its digits is 1451520, while the sum is 52.

The square root of 28947589 is about 5380.2963673017. The cubic root of 28947589 is about 307.0464868225.

The spelling of 28947589 in words is "twenty-eight million, nine hundred forty-seven thousand, five hundred eighty-nine".