28284209373947 has 2 divisors, whose sum is σ = 28284209373948. Its totient is φ = 28284209373946.

The previous prime is 28284209373923. The next prime is 28284209373967. The reversal of 28284209373947 is 74937390248282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28284209373947 - 2⁸ = 28284209373691 is a prime.

It is not a weakly prime, because it can be changed into another prime (28284209373907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142104686973 + 14142104686974.

It is an arithmetic number, because the mean of its divisors is an integer number (14142104686974).

Almost surely, 2^{28284209373947} is an apocalyptic number.

28284209373947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28284209373947 is an equidigital number, since it uses as much as digits as its factorization.

28284209373947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 292626432, while the sum is 68.

The spelling of 28284209373947 in words is "twenty-eight trillion, two hundred eighty-four billion, two hundred nine million, three hundred seventy-three thousand, nine hundred forty-seven".