28790385049 has 2 divisors, whose sum is σ = 28790385050. Its totient is φ = 28790385048.

The previous prime is 28790385023. The next prime is 28790385053. The reversal of 28790385049 is 94058309782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15849047449 + 12941337600 = 125893^2 + 113760^2 .

It is a cyclic number.

It is not a de Polignac number, because 28790385049 - 2¹⁷ = 28790253977 is a prime.

It is not a weakly prime, because it can be changed into another prime (28790385749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14395192524 + 14395192525.

It is an arithmetic number, because the mean of its divisors is an integer number (14395192525).

Almost surely, 2^28790385049 is an apocalyptic number.

It is an amenable number.

28790385049 is a deficient number, since it is larger than the sum of its proper divisors (1).

28790385049 is an equidigital number, since it uses as much as digits as its factorization.

28790385049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 28790385049 in words is "twenty-eight billion, seven hundred ninety million, three hundred eighty-five thousand, forty-nine".