28689485 has 16 divisors (see below), whose sum is σ = 37687680. Its totient is φ = 20792640.

The previous prime is 28689481. The next prime is 28689499. The reversal of 28689485 is 58498682.

It is not a de Polignac number, because 28689485 - 2² = 28689481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28689481) 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 15 ways as a sum of consecutive naturals, for example, 19019 + ... + 20471.

It is an arithmetic number, because the mean of its divisors is an integer number (2355480).

Almost surely, 2^28689485 is an apocalyptic number.

It is an amenable number.

28689485 is a deficient number, since it is larger than the sum of its proper divisors (8998195).

28689485 is a wasteful number, since it uses less digits than its factorization.

28689485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828.

The product of its digits is 1105920, while the sum is 50.

The square root of 28689485 is about 5356.2566219329. The cubic root of 28689485 is about 306.1311931218.

The spelling of 28689485 in words is "twenty-eight million, six hundred eighty-nine thousand, four hundred eighty-five".