28285723 has 8 divisors (see below), whose sum is σ = 29130192. Its totient is φ = 27445536.

The previous prime is 28285711. The next prime is 28285753. The reversal of 28285723 is 32758282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28285723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28285703) 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, 16461 + ... + 18097.

It is an arithmetic number, because the mean of its divisors is an integer number (3641274).

Almost surely, 2^28285723 is an apocalyptic number.

28285723 is a deficient number, since it is larger than the sum of its proper divisors (844469).

28285723 is a wasteful number, since it uses less digits than its factorization.

28285723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141.

The product of its digits is 53760, while the sum is 37.

The square root of 28285723 is about 5318.4323818208. The cubic root of 28285723 is about 304.6882885432.

The spelling of 28285723 in words is "twenty-eight million, two hundred eighty-five thousand, seven hundred twenty-three".