28988711 has 2 divisors, whose sum is σ = 28988712. Its totient is φ = 28988710.

The previous prime is 28988683. The next prime is 28988731. The reversal of 28988711 is 11788982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28988711 - 2¹⁸ = 28726567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28988731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494355 + 14494356.

It is an arithmetic number, because the mean of its divisors is an integer number (14494356).

Almost surely, 2^28988711 is an apocalyptic number.

28988711 is a deficient number, since it is larger than the sum of its proper divisors (1).

28988711 is an equidigital number, since it uses as much as digits as its factorization.

28988711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 44.

The square root of 28988711 is about 5384.1165477727. The cubic root of 28988711 is about 307.1918114352.

The spelling of 28988711 in words is "twenty-eight million, nine hundred eighty-eight thousand, seven hundred eleven".