28589945 has 8 divisors (see below), whose sum is σ = 34340544. Its totient is φ = 22850224.

The previous prime is 28589923. The next prime is 28589947. The reversal of 28589945 is 54998582.

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

It is a cyclic number.

It is not a de Polignac number, because 28589945 - 2¹⁰ = 28588921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28589893 and 28589902.

It is not an unprimeable number, because it can be changed into a prime (28589947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5132 + ... + 9138.

It is an arithmetic number, because the mean of its divisors is an integer number (4292568).

Almost surely, 2^28589945 is an apocalyptic number.

It is an amenable number.

28589945 is a deficient number, since it is larger than the sum of its proper divisors (5750599).

28589945 is a wasteful number, since it uses less digits than its factorization.

28589945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5439.

The product of its digits is 1036800, while the sum is 50.

The square root of 28589945 is about 5346.9566110078. The cubic root of 28589945 is about 305.7767356273.

The spelling of 28589945 in words is "twenty-eight million, five hundred eighty-nine thousand, nine hundred forty-five".