28513605 has 8 divisors (see below), whose sum is σ = 45621792. Its totient is φ = 15207248.

The previous prime is 28513577. The next prime is 28513621. The reversal of 28513605 is 50631582.

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 28513605 - 2¹⁰ = 28512581 is a prime.

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, 950439 + ... + 950468.

It is an arithmetic number, because the mean of its divisors is an integer number (5702724).

Almost surely, 2^28513605 is an apocalyptic number.

It is an amenable number.

28513605 is a deficient number, since it is larger than the sum of its proper divisors (17108187).

28513605 is a wasteful number, since it uses less digits than its factorization.

28513605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900915.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 28513605 is about 5339.8131989799. The cubic root of 28513605 is about 305.5043344567.

The spelling of 28513605 in words is "twenty-eight million, five hundred thirteen thousand, six hundred five".