28773779 has 2 divisors, whose sum is σ = 28773780. Its totient is φ = 28773778.

The previous prime is 28773749. The next prime is 28773781. The reversal of 28773779 is 97737782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28773779 - 2⁸ = 28773523 is a prime.

Together with 28773781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28773709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14386889 + 14386890.

It is an arithmetic number, because the mean of its divisors is an integer number (14386890).

Almost surely, 2^28773779 is an apocalyptic number.

28773779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28773779 is an equidigital number, since it uses as much as digits as its factorization.

28773779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1037232, while the sum is 50.

The square root of 28773779 is about 5364.1195922537. The cubic root of 28773779 is about 306.4307197133.

The spelling of 28773779 in words is "twenty-eight million, seven hundred seventy-three thousand, seven hundred seventy-nine".