28512605 has 8 divisors (see below), whose sum is σ = 37325664. Its totient is φ = 20736400.

The previous prime is 28512599. The next prime is 28512623. The reversal of 28512605 is 50621582.

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

It is not a de Polignac number, because 28512605 - 2⁶ = 28512541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 259151 + ... + 259260.

It is an arithmetic number, because the mean of its divisors is an integer number (4665708).

Almost surely, 2^28512605 is an apocalyptic number.

It is an amenable number.

28512605 is a deficient number, since it is larger than the sum of its proper divisors (8813059).

28512605 is a wasteful number, since it uses less digits than its factorization.

28512605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518427.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28512605 is about 5339.7195619246. The cubic root of 28512605 is about 305.5007629697.

Subtracting from 28512605 its sum of digits (29), we obtain a triangular number (28512576 = T₇₅₅₁).

The spelling of 28512605 in words is "twenty-eight million, five hundred twelve thousand, six hundred five".