28818511 has 2 divisors, whose sum is σ = 28818512. Its totient is φ = 28818510.

The previous prime is 28818481. The next prime is 28818521. The reversal of 28818511 is 11581882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28818511 - 2¹³ = 28810319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28818521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14409255 + 14409256.

It is an arithmetic number, because the mean of its divisors is an integer number (14409256).

Almost surely, 2^28818511 is an apocalyptic number.

28818511 is a deficient number, since it is larger than the sum of its proper divisors (1).

28818511 is an equidigital number, since it uses as much as digits as its factorization.

28818511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 34.

The square root of 28818511 is about 5368.2875295573. The cubic root of 28818511 is about 306.5894309012.

The spelling of 28818511 in words is "twenty-eight million, eight hundred eighteen thousand, five hundred eleven".