28849609 has 8 divisors (see below), whose sum is σ = 29725920. Its totient is φ = 27981600.

The previous prime is 28849591. The next prime is 28849669. The reversal of 28849609 is 90694882.

28849609 = 422² + 423² + ... + 544².

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 28849609 - 2¹⁷ = 28718537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28849669) 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, 5374 + ... + 9304.

It is an arithmetic number, because the mean of its divisors is an integer number (3715740).

Almost surely, 2^28849609 is an apocalyptic number.

It is an amenable number.

28849609 is a deficient number, since it is larger than the sum of its proper divisors (876311).

28849609 is a wasteful number, since it uses less digits than its factorization.

28849609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 28849609 is about 5371.1832029824. The cubic root of 28849609 is about 306.6996712798.

The spelling of 28849609 in words is "twenty-eight million, eight hundred forty-nine thousand, six hundred nine".