28060509 has 8 divisors (see below), whose sum is σ = 37638720. Its totient is φ = 18594656.

The previous prime is 28060447. The next prime is 28060531. The reversal of 28060509 is 90506082.

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 28060509 - 2¹⁶ = 27994973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28060309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27504 + ... + 28505.

It is an arithmetic number, because the mean of its divisors is an integer number (4704840).

Almost surely, 2^28060509 is an apocalyptic number.

It is an amenable number.

28060509 is a deficient number, since it is larger than the sum of its proper divisors (9578211).

28060509 is a wasteful number, since it uses less digits than its factorization.

28060509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56179.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 28060509 is about 5297.2170995722. The cubic root of 28060509 is about 303.8774790493.

The spelling of 28060509 in words is "twenty-eight million, sixty thousand, five hundred nine".