28007605 has 8 divisors (see below), whose sum is σ = 33702912. Its totient is φ = 22343568.

The previous prime is 28007597. The next prime is 28007621. The reversal of 28007605 is 50670082.

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 28007605 - 2³ = 28007597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5797 + ... + 9466.

It is an arithmetic number, because the mean of its divisors is an integer number (4212864).

Almost surely, 2^28007605 is an apocalyptic number.

It is an amenable number.

28007605 is a deficient number, since it is larger than the sum of its proper divisors (5695307).

28007605 is a wasteful number, since it uses less digits than its factorization.

28007605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15635.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28007605 is about 5292.2211782956. The cubic root of 28007605 is about 303.6863866741.

Adding to 28007605 its reverse (50670082), we get a palindrome (78677687).

The spelling of 28007605 in words is "twenty-eight million, seven thousand, six hundred five".