28078734241 has 2 divisors, whose sum is σ = 28078734242. Its totient is φ = 28078734240.

The previous prime is 28078734197. The next prime is 28078734253. The reversal of 28078734241 is 14243787082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19299044241 + 8779690000 = 138921^2 + 93700^2 .

It is a cyclic number.

It is not a de Polignac number, because 28078734241 - 2¹⁵ = 28078701473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28078734191 and 28078734200.

It is not a weakly prime, because it can be changed into another prime (28078734841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039367120 + 14039367121.

It is an arithmetic number, because the mean of its divisors is an integer number (14039367121).

Almost surely, 2^28078734241 is an apocalyptic number.

It is an amenable number.

28078734241 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078734241 is an equidigital number, since it uses as much as digits as its factorization.

28078734241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 602112, while the sum is 46.

The spelling of 28078734241 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-four thousand, two hundred forty-one".