28550779 has 2 divisors, whose sum is σ = 28550780. Its totient is φ = 28550778.

The previous prime is 28550747. The next prime is 28550789. The reversal of 28550779 is 97705582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28550779 - 2⁵ = 28550747 is a prime.

It is not a weakly prime, because it can be changed into another prime (28550789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14275389 + 14275390.

It is an arithmetic number, because the mean of its divisors is an integer number (14275390).

Almost surely, 2^28550779 is an apocalyptic number.

28550779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28550779 is an equidigital number, since it uses as much as digits as its factorization.

28550779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 28550779 is about 5343.2928985786. The cubic root of 28550779 is about 305.6370417064.

The spelling of 28550779 in words is "twenty-eight million, five hundred fifty thousand, seven hundred seventy-nine".