28711723 has 2 divisors, whose sum is σ = 28711724. Its totient is φ = 28711722.

The previous prime is 28711687. The next prime is 28711747. The reversal of 28711723 is 32711782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28711723 - 2⁹ = 28711211 is a prime.

It is not a weakly prime, because it can be changed into another prime (28711763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14355861 + 14355862.

It is an arithmetic number, because the mean of its divisors is an integer number (14355862).

Almost surely, 2^28711723 is an apocalyptic number.

28711723 is a deficient number, since it is larger than the sum of its proper divisors (1).

28711723 is an equidigital number, since it uses as much as digits as its factorization.

28711723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 28711723 is about 5358.3321099014. The cubic root of 28711723 is about 306.2102695648.

The spelling of 28711723 in words is "twenty-eight million, seven hundred eleven thousand, seven hundred twenty-three".