28547723 has 4 divisors (see below), whose sum is σ = 28559808. Its totient is φ = 28535640.

The previous prime is 28547713. The next prime is 28547759. The reversal of 28547723 is 32774582.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28547723 - 2¹⁰ = 28546699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28547713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211 + ... + 7652.

It is an arithmetic number, because the mean of its divisors is an integer number (7139952).

Almost surely, 2^28547723 is an apocalyptic number.

28547723 is a deficient number, since it is larger than the sum of its proper divisors (12085).

28547723 is an equidigital number, since it uses as much as digits as its factorization.

28547723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12084.

The product of its digits is 94080, while the sum is 38.

The square root of 28547723 is about 5343.0069249440. The cubic root of 28547723 is about 305.6261364567.

The spelling of 28547723 in words is "twenty-eight million, five hundred forty-seven thousand, seven hundred twenty-three".