28523705 has 16 divisors (see below), whose sum is σ = 41420160. Its totient is φ = 18408192.

The previous prime is 28523701. The next prime is 28523717. The reversal of 28523705 is 50732582.

It is a cyclic number.

It is not a de Polignac number, because 28523705 - 2² = 28523701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28523701) 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, 23375 + ... + 24564.

It is an arithmetic number, because the mean of its divisors is an integer number (2588760).

Almost surely, 2^28523705 is an apocalyptic number.

It is an amenable number.

28523705 is a deficient number, since it is larger than the sum of its proper divisors (12896455).

28523705 is a wasteful number, since it uses less digits than its factorization.

28523705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47968.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28523705 is about 5340.7588412135. The cubic root of 28523705 is about 305.5404017952.

The spelling of 28523705 in words is "twenty-eight million, five hundred twenty-three thousand, seven hundred five".