28776911 has 2 divisors, whose sum is σ = 28776912. Its totient is φ = 28776910.

The previous prime is 28776863. The next prime is 28776931. The reversal of 28776911 is 11967782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28776911 - 2¹⁸ = 28514767 is a prime.

It is a super-2 number, since 2×28776911² = 1656221213403842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28776931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14388455 + 14388456.

It is an arithmetic number, because the mean of its divisors is an integer number (14388456).

Almost surely, 2^28776911 is an apocalyptic number.

28776911 is a deficient number, since it is larger than the sum of its proper divisors (1).

28776911 is an equidigital number, since it uses as much as digits as its factorization.

28776911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 28776911 is about 5364.4115241096. The cubic root of 28776911 is about 306.4418375461.

The spelling of 28776911 in words is "twenty-eight million, seven hundred seventy-six thousand, nine hundred eleven".