28985711 has 2 divisors, whose sum is σ = 28985712. Its totient is φ = 28985710.

The previous prime is 28985701. The next prime is 28985717. The reversal of 28985711 is 11758982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28985711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28985717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14492855 + 14492856.

It is an arithmetic number, because the mean of its divisors is an integer number (14492856).

Almost surely, 2^28985711 is an apocalyptic number.

28985711 is a deficient number, since it is larger than the sum of its proper divisors (1).

28985711 is an equidigital number, since it uses as much as digits as its factorization.

28985711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 41.

The square root of 28985711 is about 5383.8379433263. The cubic root of 28985711 is about 307.1812141234.

The spelling of 28985711 in words is "twenty-eight million, nine hundred eighty-five thousand, seven hundred eleven".