28084605 has 16 divisors (see below), whose sum is σ = 46385664. Its totient is φ = 14495040.

The previous prime is 28084601. The next prime is 28084607. The reversal of 28084605 is 50648082.

It is not a de Polignac number, because 28084605 - 2² = 28084601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29734 + ... + 30663.

It is an arithmetic number, because the mean of its divisors is an integer number (2899104).

Almost surely, 2^28084605 is an apocalyptic number.

It is an amenable number.

28084605 is a deficient number, since it is larger than the sum of its proper divisors (18301059).

28084605 is a wasteful number, since it uses less digits than its factorization.

28084605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60436.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 28084605 is about 5299.4910132955. The cubic root of 28084605 is about 303.9644356191.

The spelling of 28084605 in words is "twenty-eight million, eighty-four thousand, six hundred five".