28961711 has 2 divisors, whose sum is σ = 28961712. Its totient is φ = 28961710.

The previous prime is 28961707. The next prime is 28961717. The reversal of 28961711 is 11716982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28961711 - 2² = 28961707 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28961717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14480855 + 14480856.

It is an arithmetic number, because the mean of its divisors is an integer number (14480856).

Almost surely, 2^28961711 is an apocalyptic number.

28961711 is a deficient number, since it is larger than the sum of its proper divisors (1).

28961711 is an equidigital number, since it uses as much as digits as its factorization.

28961711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 35.

The square root of 28961711 is about 5381.6085885170. The cubic root of 28961711 is about 307.0964092940.

The spelling of 28961711 in words is "twenty-eight million, nine hundred sixty-one thousand, seven hundred eleven".