28649589 has 8 divisors (see below), whose sum is σ = 38349120. Its totient is φ = 19024896.

The previous prime is 28649563. The next prime is 28649597. The reversal of 28649589 is 98594682.

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

It is not a de Polignac number, because 28649589 - 2⁵ = 28649557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28649519) 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, 17809 + ... + 19350.

It is an arithmetic number, because the mean of its divisors is an integer number (4793640).

Almost surely, 2^28649589 is an apocalyptic number.

It is an amenable number.

28649589 is a deficient number, since it is larger than the sum of its proper divisors (9699531).

28649589 is a wasteful number, since it uses less digits than its factorization.

28649589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37419.

The product of its digits is 1244160, while the sum is 51.

The square root of 28649589 is about 5352.5310835155. The cubic root of 28649589 is about 305.9892238505.

The spelling of 28649589 in words is "twenty-eight million, six hundred forty-nine thousand, five hundred eighty-nine".