28609016 has 8 divisors (see below), whose sum is σ = 53641920. Its totient is φ = 14304504.

The previous prime is 28609013. The next prime is 28609019. The reversal of 28609016 is 61090682.

It is an interprime number because it is at equal distance from previous prime (28609013) and next prime (28609019).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28609013) 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 as a sum of consecutive naturals, namely, 1788056 + ... + 1788071.

It is an arithmetic number, because the mean of its divisors is an integer number (6705240).

Almost surely, 2^28609016 is an apocalyptic number.

It is an amenable number.

28609016 is a deficient number, since it is larger than the sum of its proper divisors (25032904).

28609016 is a wasteful number, since it uses less digits than its factorization.

28609016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576133 (or 3576129 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 28609016 is about 5348.7396646313. The cubic root of 28609016 is about 305.8447102477.

Adding to 28609016 its reverse (61090682), we get a palindrome (89699698).

The spelling of 28609016 in words is "twenty-eight million, six hundred nine thousand, sixteen".