28605723 has 8 divisors (see below), whose sum is σ = 38362128. Its totient is φ = 18959904.

The previous prime is 28605691. The next prime is 28605749. The reversal of 28605723 is 32750682.

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

It is not a de Polignac number, because 28605723 - 2⁵ = 28605691 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28605023) 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, 27040 + ... + 28077.

It is an arithmetic number, because the mean of its divisors is an integer number (4795266).

Almost surely, 2^28605723 is an apocalyptic number.

28605723 is a deficient number, since it is larger than the sum of its proper divisors (9756405).

28605723 is a wasteful number, since it uses less digits than its factorization.

28605723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55293.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28605723 is about 5348.4318262459. The cubic root of 28605723 is about 305.8329751910.

The spelling of 28605723 in words is "twenty-eight million, six hundred five thousand, seven hundred twenty-three".