28513711 has 2 divisors, whose sum is σ = 28513712. Its totient is φ = 28513710.

The previous prime is 28513691. The next prime is 28513733. The reversal of 28513711 is 11731582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28513711 - 2⁵ = 28513679 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28513711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28513741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14256855 + 14256856.

It is an arithmetic number, because the mean of its divisors is an integer number (14256856).

Almost surely, 2^28513711 is an apocalyptic number.

28513711 is a deficient number, since it is larger than the sum of its proper divisors (1).

28513711 is an equidigital number, since it uses as much as digits as its factorization.

28513711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 28513711 is about 5339.8231244115. The cubic root of 28513711 is about 305.5047130294.

The spelling of 28513711 in words is "twenty-eight million, five hundred thirteen thousand, seven hundred eleven".