28645723 has 2 divisors, whose sum is σ = 28645724. Its totient is φ = 28645722.

The previous prime is 28645717. The next prime is 28645753. The reversal of 28645723 is 32754682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28645723 - 2⁵ = 28645691 is a prime.

It is not a weakly prime, because it can be changed into another prime (28645753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322861 + 14322862.

It is an arithmetic number, because the mean of its divisors is an integer number (14322862).

Almost surely, 2^28645723 is an apocalyptic number.

28645723 is a deficient number, since it is larger than the sum of its proper divisors (1).

28645723 is an equidigital number, since it uses as much as digits as its factorization.

28645723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 28645723 is about 5352.1699337745. The cubic root of 28645723 is about 305.9754597490.

The spelling of 28645723 in words is "twenty-eight million, six hundred forty-five thousand, seven hundred twenty-three".